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At the cited UK prices for 256GB models, the Galaxy S25 Ultra was listed at £1,249 RRP and the Xiaomi 17T was reported at £649—a £600 difference. These are historical price references, not a live comparison of what retailers charge today. On paper, Xiaomi offers the lower price, a larger-capacity battery and 67W wired charging; Samsung lists a larger, higher-resolution display, two optical telephoto cameras and storage up to 1TB.
Samsung Galaxy S25 Ultra vs Xiaomi 17T: key specs
| Specification | Samsung Galaxy S25 Ultra | Xiaomi 17T |
|---|---|---|
| Display | 6.9-inch QHD+ Dynamic AMOLED 2X, up to 120Hz; Samsung also describes the display as 6.8 inches when accounting for rounded corners. | 6.59-inch 1.5K AMOLED, up to 120Hz. |
| Processor | Snapdragon 8 Elite for Galaxy. | MediaTek Dimensity 8500-Ultra. |
| RAM and storage | 12GB RAM; 256GB, 512GB or 1TB storage. | 12GB RAM; 256GB or 512GB storage. |
| Rear cameras | 200MP main with OIS, 50MP ultrawide, 50MP 5x optical telephoto with OIS, and 10MP 3x optical telephoto with OIS. | Leica 5x periscope telephoto promoted on Xiaomi’s product page; the official specifications excerpt lists a 50MP main camera with OIS and 12MP ultrawide. Specific telephoto sensor details are not established in that excerpt. |
| Typical battery capacity | 5,000mAh. | 6,500mAh. |
| Wired charging | Not stated in the cited UK launch announcement. | 67W HyperCharge. |
| Dimensions | 162.8 × 77.6 × 8.2mm. | 157.6 × 75.2 × 8.17mm. |
| Weight | 218g. | 200g. |
| UK price references | £1,249 RRP for 256GB; £1,349 for 512GB; £1,549 for 1TB, according to Samsung’s UK launch announcement. | £649 for 256GB and £699 for 512GB, as reported in TechRadar’s June 2026 review. |
Samsung’s specifications and launch RRPs come from its UK launch announcement. Xiaomi’s hardware figures come from its Global specifications page; its product page promotes the Leica 5x periscope camera. The Xiaomi UK prices are review-reported prices, not manufacturer UK launch RRPs.
How big is the UK price difference?
Comparing the 256GB references, the S25 Ultra’s £1,249 UK RRP is £600 above the Xiaomi 17T’s £649 price reported by TechRadar in June 2026. The comparison is not perfectly like-for-like in source or timing: Samsung’s figure is its launch RRP, while Xiaomi’s is a review-reported UK price. For 512GB, the cited figures are £1,349 for Samsung and £699 for Xiaomi, a £650 gap. Samsung also listed a 1TB model at £1,549; Xiaomi’s cited specifications list storage only up to 512GB.
These figures should not be treated as current checkout prices. Retail discounts, stock and availability can change, and the cited prices do not establish Xiaomi pricing outside the UK. Check local unlocked versions and current retailer listings before deciding which is better value.
#1 Best Overall
- Stunning 6.9″ Dynamic AMOLED 2X QHD+ display with adaptive 1–120 Hz refresh rate, ultra‑bright up to ~2600 nits, HDR support, “Vision Booster,” and adaptive color tone — giving vivid colours, great outdoor visibility, and super‑smooth scrolling.
- Powerful internals: it runs on the new Snapdragon 8 Elite for Galaxy (3 nm) chip, with 12 GB (or in some markets up to 16 GB) RAM and up to 1 TB UFS 4.0 storage — offering significantly improved CPU/GPU/NPU performance, especially for AI tasks, gaming, and heavy multitasking.
- Advanced quad‑camera system: 200 MP wide main sensor, plus a 50 MP ultrawide, a 50 MP periscope telephoto (5× optical zoom), and a 10 MP telephoto (3× optical zoom) — giving flexibility from ultra‑wide through detailed telephoto shots, and strong performance in varied lighting.
- 5,000 mAh battery with 45 W fast wired charging, wireless charging (Qi2) and reverse wireless charging — balancing long battery life with flexible charging options.
- Durable, premium build: Titanium‑frame body, protected by Corning Gorilla Armor 2 glass, with IP68 dust/water resistance, ultrasonic in‑display fingerprint sensor, modern connectivity (5G, Wi‑Fi 7, Bluetooth, UWB, USB‑C), and long‑term software support (Android 15 / One UI 7, promised 7 major OS/security updates).
Where the specifications differ in practice
Display: larger and sharper on Samsung’s listed specifications
Samsung lists a 6.9-inch QHD+ panel, compared with Xiaomi’s 6.59-inch 1.5K display. Both are specified for refresh rates up to 120Hz. The screen-size figures use manufacturer conventions—Samsung also gives 6.8 inches when accounting for rounded corners—so they are best read as approximate panel comparisons. Peak-brightness claims should not be treated as directly comparable test results when measurement conditions differ.
Performance: different chips, no proven winner from names alone
The S25 Ultra uses Qualcomm’s Snapdragon 8 Elite for Galaxy, while the 17T uses MediaTek’s Dimensity 8500-Ultra. Both cited configurations have 12GB RAM. Those labels identify different platforms but do not, by themselves, establish which phone feels faster in everyday use or sustains performance better under extended workloads.
Rank #2
- Stunning 6.9″ Dynamic AMOLED 2X QHD+ display with adaptive 1–120 Hz refresh rate, ultra‑bright up to ~2600 nits, HDR support, “Vision Booster,” and adaptive color tone — giving vivid colours, great outdoor visibility, and super‑smooth scrolling.
- Powerful internals: it runs on the new Snapdragon 8 Elite for Galaxy (3 nm) chip, with 12 GB (or in some markets up to 16 GB) RAM and up to 1 TB UFS 4.0 storage — offering significantly improved CPU/GPU/NPU performance, especially for AI tasks, gaming, and heavy multitasking.
- Advanced quad‑camera system: 200 MP wide main sensor, plus a 50 MP ultrawide, a 50 MP periscope telephoto (5× optical zoom), and a 10 MP telephoto (3× optical zoom) — giving flexibility from ultra‑wide through detailed telephoto shots, and strong performance in varied lighting.
- 5,000 mAh battery with 45 W fast wired charging, wireless charging (Qi2) and reverse wireless charging — balancing long battery life with flexible charging options.
- Durable, premium build: Titanium‑frame body, protected by Corning Gorilla Armor 2 glass, with IP68 dust/water resistance, ultrasonic in‑display fingerprint sensor, modern connectivity (5G, Wi‑Fi 7, Bluetooth, UWB, USB‑C), and long‑term software support (Android 15 / One UI 7, promised 7 major OS/security updates).
Cameras: distinct zoom arrangements
Samsung specifies two optical telephoto cameras: one with 3x optical zoom and another with 5x, alongside a 200MP main camera and 50MP ultrawide. Xiaomi promotes a Leica 5x periscope telephoto, while its surfaced official specification details include a 50MP OIS main camera and 12MP ultrawide. The available Xiaomi specification excerpt does not fully detail the telephoto sensor. Hardware coverage is not a controlled photo comparison, so it cannot establish which phone takes better pictures.
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Battery and charging: Xiaomi lists more capacity and higher wired wattage
Xiaomi lists a 6,500mAh typical-capacity battery and 67W HyperCharge; Samsung lists 5,000mAh typical capacity. Xiaomi’s page also says a power adapter is not included, while Samsung’s UK announcement says no travel adapter is included. Battery capacity and charging wattage alone do not determine real-world battery life or the time needed for a full charge.
Rank #3
- Stunning 6.9″ Dynamic AMOLED 2X QHD+ display with adaptive 1–120 Hz refresh rate, ultra‑bright up to ~2600 nits, HDR support, “Vision Booster,” and adaptive color tone — giving vivid colours, great outdoor visibility, and super‑smooth scrolling.
- Powerful internals: it runs on the new Snapdragon 8 Elite for Galaxy (3 nm) chip, with 12 GB (or in some markets up to 16 GB) RAM and up to 1 TB UFS 4.0 storage — offering significantly improved CPU/GPU/NPU performance, especially for AI tasks, gaming, and heavy multitasking.
- Advanced quad‑camera system: 200 MP wide main sensor, plus a 50 MP ultrawide, a 50 MP periscope telephoto (5× optical zoom), and a 10 MP telephoto (3× optical zoom) — giving flexibility from ultra‑wide through detailed telephoto shots, and strong performance in varied lighting.
- 5,000 mAh battery with 45 W fast wired charging, wireless charging (Qi2) and reverse wireless charging — balancing long battery life with flexible charging options.
- Durable, premium build: Titanium‑frame body, protected by Corning Gorilla Armor 2 glass, with IP68 dust/water resistance, ultrasonic in‑display fingerprint sensor, modern connectivity (5G, Wi‑Fi 7, Bluetooth, UWB, USB‑C), and long‑term software support (Android 15 / One UI 7, promised 7 major OS/security updates).
Size and storage
The Xiaomi is shorter, narrower and lighter according to the listed dimensions: 157.6 × 75.2 × 8.17mm and 200g, versus Samsung’s 162.8 × 77.6 × 8.2mm and 218g. Samsung’s UK launch options extend to 1TB, while Xiaomi’s cited Global specifications list a maximum of 512GB.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which phone should you choose?
Choose the Xiaomi 17T if your priorities are price and a lighter handset
- You want the lower of the cited UK 256GB price references.
- You prefer a shorter, narrower phone with lower listed weight.
- You value the larger stated battery capacity and 67W wired charging specification.
Choose the Galaxy S25 Ultra if you want Samsung’s listed display and camera options
- You want the larger, higher-resolution display on the specification sheet.
- You want two specified optical telephoto focal lengths, 3x and 5x.
- You need Samsung’s listed 1TB storage configuration.
This is a specification-based choice, not a universal performance or camera verdict. Before buying, compare the current price for the same storage tier, local warranty, network bands and in-box charger expectations. Xiaomi notes that network-band availability varies by region and that usable RAM and storage are lower than the stated totals because of system software; consult the local product page for your market.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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