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The realme 15 5G is the larger-screen, higher-capacity-battery option; the vivo X300 FE is more compact and adds a dedicated telephoto camera, a higher-tier listed chipset and IP68/IP69 protection. The realme is also at a much lower observed price point, but the available price snapshots are not a matched, guaranteed comparison. The specifications below are manufacturer-listed for India, and prices should be checked against the exact variant and seller before buying.
realme 15 vs vivo X300 FE: specifications
The table compares India-listed specifications. Regional models may differ in configuration, software, network bands or box contents.
| Specification | realme 15 5G | vivo X300 FE |
|---|---|---|
| Display | 6.8-inch, 1280 × 2800, up to 144Hz; realme calls it a 4D Curve+ display | 6.31-inch AMOLED, 2640 × 1216, 120Hz |
| Chipset | MediaTek Dimensity 7300+, 4nm, up to 2.5GHz | Snapdragon 8 Gen 5, 3nm, 2 × 3.80GHz + 6 × 3.32GHz |
| Listed RAM and storage | 8GB or 12GB LPDDR4X; 128GB or 256GB UFS 3.1 | 8GB+256GB or 12GB+512GB on the specifications page; vivo’s store also displayed a 12GB+256GB listing |
| Rear cameras | 50MP Sony IMX882 OIS main; 8MP wide-angle | 50MP AF OIS main (IMX921); 50MP OIS telephoto (IMX882); 8MP wide-angle |
| Front camera | 50MP | 50MP autofocus |
| Battery | 7000mAh typical; 6830mAh minimum | 6500mAh typical; 6350mAh minimum/rated |
| Wired charging | 80W Ultra Charge; adapter listed in the package | 90W FlashCharge with original vivo charger and cable; actual power varies with use |
| Software at listing | realme UI 6.0 based on Android 15 | OriginOS 6 based on Android 16 |
| Dimensions and weight | 162.27 × 76.16mm; approximately 7.66–7.96mm thick depending on color; approximately 187–189g | 150.83 × 71.76 × 7.99mm; 191g |
| Ingress protection | A rated IP code was not provided in the cited India specification extract | IP68 and IP69 listed by vivo India |
Specifications are from the realme India specifications and vivo India specifications. They describe hardware and listed configurations, not independently measured results.
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Display and size: big screen or compact body?
The realme 15 has a 6.8-inch display, compared with 6.31 inches on the vivo X300 FE. That makes the realme the more screen-focused choice for users who prefer a larger viewing area, while the vivo is the more compact phone by width and height. The realme also lists a higher maximum refresh rate, up to 144Hz versus 120Hz on the vivo; refresh-rate figures alone do not establish a perceptible advantage in every app or use case.
#1 Best Overall
- USA MARKET ONLY WORK ON TMOBILE MINT TELLO OR ANY UNDER TMOBILE NETWORK PHONE NEEDS A SIM CARD ALREADY ACTIVATED ,OUTSIDE USA WORKS ANY GSM CARRIER SIM GSM FCC ID: 2AFZZRA29G
- Dual SIM (nano SIM + nano SIM or nano SIM + eSIM) NO MICRO SD SLOT. 5G: n1/2/3/5/7/8/12/20/26/28/38/40/41/48/66/77/78 - 4G: LTE FDD: 1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B26/B28/B32/B66 4G: LTE TDD: B38/B40/B41/B42/B48 - 3G: WCDMA: B1/B2/B4/B5/B6/B8/B19 - 2G: GSM: B2/B3/B5/B8
- 6.83" AMOLED displayResolution: 1.5K (2772 x 1280)Refresh rate: Up to 120HzTouch sampling rate: Up to 480HzInstantaneous touch sampling rate: 2560Hz*Activated in Game Turbo modeBrightness: 3200 nits peak brightnessBrightness: HBM 1800 nitsColor depth: 12bitContrast ratio: 8000000:1DCI- P3 wide color gamut447PPICorning Gorilla Glass Victus 2Sunlight displayHDR10+ | Dolby Vision16,000-step automatic brightness adjustment3840Hz PWM dimming｜TÜV Rheinland Low Blue Light (Hardware Solution) Certified | TÜV Rheinland Circadian Friendly Certified | TÜV Rheinland Flicker Free Certified
- MediaTek Dimensity 7400-Ultra4nm manufacturing process technologyCPU: Octa-core processor, up to 2.6GHzGPU: Mali-G615
- 200MP main cameraOptical Image Stabilization (OIS)0.56μm, 16in1, 2.24μmf/1.77P lens1/1.4" sensor size8MP ultra-wide cameraf/2.2Rear camera video recording4K at 30 fps1080p at 30/60 fps720p at 30 fps / Front Camera 20MP front camera1/4" sensor sizef/2.24P lensFront camera video recording1080p at 30/60 fps720p at 30 fps
Performance: the listed chipsets are in different tiers
realme lists the Dimensity 7300+ on a 4nm process, while vivo lists the Snapdragon 8 Gen 5 on a 3nm process. On the listed platforms, the vivo sits in a substantially higher processor tier. That specification comparison is not a substitute for controlled benchmarks or sustained-use testing, so it cannot establish gaming frame rates, heat behavior or everyday speed by itself.
Cameras: vivo adds a dedicated telephoto lens
Both phones list a 50MP OIS main rear camera and an 8MP wide-angle camera. The vivo adds a 50MP OIS telephoto camera, giving it a dedicated rear-camera option that the realme’s listed setup does not have. Both list a 50MP front camera, with autofocus specified for the vivo.
vivo also says its ZEISS Telephoto Extender Gen 2 is compatible with the X300 FE and must be purchased separately. Camera hardware does not establish which phone takes better photos or video; that requires comparable image testing.
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realme lists a 7000mAh typical battery (6830mAh minimum), against 6500mAh typical (6350mAh minimum/rated) for vivo. The realme therefore has the higher listed capacity. Charging is rated at 80W for realme and 90W FlashCharge for vivo; vivo specifies use of its original charger and cable and notes that actual charging power varies with use. Capacity and wattage figures do not establish real-world battery life or a full-charge time.
Rank #2
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- nano SIM 1 + Hybrid (nano SIM or microSD) Dual standby , n1/2/3/5/7/8/12/20/26/28/38/40/41/48/66/77/78 4G : B1/2/3/4/5/7/8/12/13/17/18/19/20/26/28/32/66 4G: LTE TDD: B38/40/41/42/48 3G: WCDMA: Band 2/4/5/8 2G: GSM: Quad Band.
- 6.77" AMOLED displayResolution: 2392 × 1080Refresh rate: Up to 120HzTouch sampling rate: 240HzBrightness: 3200 nits peak brightness, 800 nits (typ)Colour depth: 12 bitContrast ratio: 8,000,000:1DCI- P3 wide color gamutSunlight displayReading mode3840Hz PWM dimming｜16,000-level brightness adjustmentScreen-to-body ratio: 92%*Data obtained from Xiaomi Internal Labs. Actual results may vary.TÜV Rheinland Low Blue Light (Hardware Solution) Certified TÜV Rheinland Circadian Friendly Certified TÜV Rheinland Flicker Free Certified
- Snapdragon 6 Gen 3 Mobile Platform4nm manufacturing process technologyCPU: Octa-core processor, up to 2.4GHzGPU: Adreno
- Virtual proximity sensor | Ambient light sensor | Accelerometer | Electronic compass | IR blaster | Gyroscope / GPS: L1 | GLONASS: G1 | BDS: B1I | Galileo E1 / Wireless NetworksBluetooth 5.3Wi-Fi Protocol: 802.11a/b/g/n/ac Supports 2.4GHz Wi-Fi | 5GHz Wi-Fi Wi-Fi Direct / In-screen fingerprint sensorAI Face Unlock
India price difference: check matched offers before comparing
Prices are volatile and the available observations do not form a like-for-like retailer comparison.
| Price observation | Variant or listing detail | What it tells you |
|---|---|---|
| ₹89,999 displayed offer; ₹119,999 MRP | vivo India Store listing for X300 FE 12GB+256GB, observed in 2026 | A live-store snapshot, not a guaranteed future price |
| ₹29,999 for realme 15; ₹94,999 for X300 FE | 91mobiles comparison snapshot observed in 2026; exact matched seller and variant conditions are not established | A third-party snapshot; another result from the same comparison site showed different prices |
The vivo store listing is on vivo India Store; the comparison snapshot is from 91mobiles. Do not subtract these observations and treat the result as a dependable price gap: seller, variant and discount conditions may differ. For a current comparison, check both listings on the same day, match RAM and storage where possible, and compare the seller, effective checkout price and offer conditions.
Which phone should you choose?
Choose the realme 15 5G if
- You want the larger 6.8-inch display and a listed refresh rate of up to 144Hz.
- You prioritize the higher listed battery capacity.
- You find a current offer that makes its lower observed price point the better fit for your budget.
Choose the vivo X300 FE if
- You prefer a smaller 6.31-inch display and a more compact body.
- You want the higher-tier listed chipset or a dedicated telephoto camera.
- IP68/IP69 protection is important to you.
What the specifications cannot settle
The manufacturer listings support comparisons of components and stated features, but do not establish comparative camera quality, sustained gaming performance, battery endurance, software-support duration, or warranty and service experience. Those questions need direct testing or additional current evidence rather than inference from the spec sheet.
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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.
