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The vivo S2 has the sharper, slightly larger display and a higher-resolution front camera; the OPPO K13 5G stands out for 80W wired charging. Both have 120Hz AMOLED screens, 50MP main rear cameras, 8GB RAM options and 128GB or 256GB storage. There is no reliable current like-for-like price difference in the available listings, so compare the same storage variant at checkout rather than treating older launch prices as current.
Which phone is better on paper?
Choose the vivo S2 if you prioritize its higher-resolution 1.5K display, 32MP front camera and lower listed weight. Choose the OPPO K13 5G if faster rated wired charging matters more: OPPO specifies 80W, compared with 44W for the S2. Their listed battery capacities are nearly the same, and the shared 50MP main-camera figure does not establish which takes better photos.
This comparison is for the India-market OPPO K13 5G (model CPH2729) and the vivo S2, which vivo India markets as a 5G phone. It does not refer to similarly named OPPO K13x or K13 Turbo models. The specifications below are manufacturer-published figures, not independent performance or camera tests.
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| Specification | OPPO K13 5G | vivo S2 5G |
|---|---|---|
| Processor | Qualcomm Snapdragon 6 Gen 4 | MediaTek Dimensity 7360-Turbo |
| Display | 6.67-inch class (16.94 cm), rigid AMOLED; 1080 × 2400 (FHD+); up to 120Hz | 6.83 inches (17.35 cm), AMOLED; 1260 × 2800 (1.5K); up to 120Hz |
| Typical battery capacity | 7,000mAh (rated capacity 6,820mAh) | 7,050mAh |
| Wired charging | 80W SUPERVOOC; OPPO says the charger is included | 44W |
| Rear cameras | 50MP wide + 2MP monochrome | 50MP main + 2MP secondary |
| Front camera | 16MP | 32MP |
| RAM and storage options | 8GB RAM; 128GB or 256GB storage | 8GB RAM; 128GB or 256GB storage |
| Weight | About 208g | 197g in Sapphire Blue or Regal Bronze; 199g in Silk White |
| Operating system named by source | ColorOS 15.0 | OriginOS 6 |
Figures and available configurations are from the OPPO K13 specifications, vivo S2 specifications and vivo India E-Store listing. Display brightness claims, where provided by manufacturers, may use different measurement conditions and are not directly comparable.
#1 Best Overall
- For USA Buyers : This Smartphone is compatible/will work with any GSM Networks such as AT&T, T-Mobile. For exact 2G GSM, 3G, 4G/LTE compatibility, please check with your network provider in advance prior to your purchase. This phone WILL NOT WORK with any CDMA Networks such as VERIZON, SPRINT, US CELLULAR.
- Dual-SIM, Network Compatibility, SIM CARD 1 AND 2 [2G : GSM 850/ 900/ 1800/ 1900 and/or 3G : WCDMA 800(B6) / 800(B19) / 850(B5) / 900(B8) / 1700|2100(B4) / 1900(B2) / 2100(B1) and/or 4G : LTE-FDD 700(B12) / 700(B13) / 700(B17) / 700(B28) / 800(B20) / 850(B5) / 850(B18) / 850(B19) / 850(B26) / 900(B8) / 1700|2100(B4) / 1800(B3) / 1900(B2) / 2100(B1) / 2100(B66) / 2600(B7) : LTE-TDD 1900(B39) / 2300(B40) / 2500(B41) / 2600(B38) and/or 5G : NR N1/N2/N3/N5/N7/N8/N12/N20/N26/N28/N38/N40/N41/N66/N77/N78]
- 6.59 inches, AMOLED, 1256 x 2760 pixels, Corning Gorilla Glass 7i
- 256GB Storage, 12GB RAM
- Android 15, ColorOS 15, Mediatek Dimensity 8350 (4 nm), Octa-core (1x3.35 GHz Cortex-A715 & 3x3.20 GHz Cortex-A715 & 4x2.20 GHz Cortex-A510)
Display: vivo lists more pixels
Both phones have AMOLED panels with refresh rates up to 120Hz, but vivo lists a larger 6.83-inch screen at 2800 × 1260 pixels. OPPO lists a 6.67-inch-class panel at 2400 × 1080 pixels. The S2 therefore has the higher listed resolution, while both share the same maximum refresh-rate figure. Those specifications alone do not establish overall image quality or viewing experience.
Battery and charging: close capacities, different charging ratings
OPPO lists a 7,000mAh typical battery capacity and 6,820mAh rated capacity. vivo lists 7,050mAh typical capacity, 50mAh more than OPPO’s typical figure. That small specification difference does not predict which phone lasts longer in everyday use.
Rank #2
- 6.57 inches, AMOLED, 1B colors, 1080 x 2372 pixels
- 256GB Storage, 8GB RAM, microSDXC
- Android 15, ColorOS 15, Qualcomm SM6450 Snapdragon 6 Gen 1 (4 nm), Octa-core (4x2.2 GHz Cortex-A78 & 4x1.8 GHz Cortex-A55)
- Rear: 50 MP, f/1.8, 26mm (wide), 1/1.95", 0.8µm, PDAF, OIS, 8 MP, f/2.2, 16mm, 112˚ (ultrawide), 1/4.0", 1.12µm, AF, 2 MP, f/2.4, (macro), Front: 32 MP, f/2.0, 22mm (wide), 1/2.74", 0.8µm, AF
- 158.1 x 75 x 7.7 mm (6.22 x 2.95 x 0.30 in)
OPPO’s rated 80W SUPERVOOC charging is higher than vivo’s 44W wired charging. OPPO says a charger is included with the K13. The wattage figures do not establish a specific time to charge: no matched charging test or common test conditions are available here.
Cameras: compare the listed hardware, not just megapixels
Both phones list a 50MP main rear camera and an additional 2MP rear camera; OPPO identifies its secondary camera as monochrome. vivo lists a 32MP front camera, compared with 16MP on the K13. A higher pixel count does not by itself prove better detail, color, low-light results or video quality, and these specifications are not substitutes for comparable camera tests.
Rank #3
- Marca original
- Garantía de tres años contra defectos de fabricación.
Price difference in India
A reliable current like-for-like price difference cannot be established from the available listings. The vivo India E-Store showed ₹42,999 for the S2 8GB+128GB Sapphire Blue listing, alongside an MRP of ₹66,999, when accessed on October 7, 2026. This is a dated store listing, not a guaranteed price at publication or checkout.
OPPO India’s announcement set the K13 launch prices at ₹17,999 for 8GB+128GB and ₹19,999 for 8GB+256GB, with sales starting April 25, 2025. These are historical launch prices, not a current OPPO quote. A broad search on October 7, 2026 also surfaced third-party listings around ₹22,999 for the K13 8GB+128GB; that indicative figure is not an official OPPO price and may vary by seller, location and checkout total. Sources: vivo India E-Store and OPPO India’s K13 price announcement.
Rank #4
- EXCLUSIVE AND STYLISH DESIGN - The Reno12 F 5G features the innovative Cosmos Ring Design, a unique design in color and style, lightweight and comfortable with only 187g in weight and 7.8mm thick, ideal for standing out anywhere.
- Exceptional Strength and Durability: IP64 and SGS certified, this smartphone is the toughest in its class. Splash Touch technology ensures that the screen works smoothly even when wet.
- Advanced AI Technology: Take advantage of advanced AI features like AI Eraser 2.0, AI Studio, and AI Smart Image Matting 2.0 to create artistic photos and edit images easily. AI Linkboost improves connectivity in saturated environments.
- 【Premium Screen & Sound】6.67 inch AMOLED FHD+ display with 120Hz and 1200Nits brightness for a superior viewing experience. Stereo sound with 300% ultra volume mode to enjoy your multimedia content without headphones.
- LONG BATTERY & FAST CHARGE - With a 5000mAh battery and 45W SupervoOC fast charging, enjoy up to two days of use and 50% charge in just 26 minutes. Battery system with 4 years of guaranteed durability.
For a useful comparison, check live offers for matching 8GB+128GB or 8GB+256GB configurations. Do not subtract OPPO’s 2025 launch price from vivo’s October 2026 store listing and present the result as today’s price gap.
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What to check before buying
- Confirm the exact model: OPPO K13 5G, model CPH2729, or vivo S2—not a similarly named model.
- Match storage capacity and color when comparing seller prices; the vivo store listing cited above is specifically for 8GB+128GB Sapphire Blue.
- Check the seller, delivery location, final checkout total and included accessories. OPPO says the K13 charger is included; confirm package contents for the exact S2 listing you are considering.
- Check the software version and update status for the region and unit being sold. The cited sources name ColorOS 15.0 for OPPO and OriginOS 6 for vivo; software versions and availability can change.
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.
