OnePlus 15 vs Samsung Galaxy S21 Plus
[ VERDICT ]
Winner: OnePlus 15 (93/100)
OnePlus 15 leads overall with a score of 93/100 compared to Samsung Galaxy S21 Plus (58/100), offering superior measured performance and technical specifications.
Benchmark Performance Comparison
Normalized Lab Scores| Benchmark | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| Gaming | 94.0 Excellent WINNER | 27.0 Poor |
| NanoReview Score | 93.0 Excellent WINNER | 58.0 Below Average |
| Performance | 98.0 Excellent WINNER | 49.0 Poor |
Detailed Technical Specifications
Battery
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| Battery cycles | 1100 cycles | — |
| Battery type | Silicon-Carbon (Si/C) | Li-Ion |
| Bypass charging | Yes | — |
| Capacity | 7300 mAh | 4800 mAh |
| Fast charging | Yes (50% in 15 min) | Yes (54% in 30 min) |
| Full charging time | 0:43 hr | 1:12 hr |
| Gaming | 10:01 hr | 05:04 hr |
| Max charge power | 120 W | 25 W |
| Replaceable | No | No |
| Reverse charging | Yes, (wireless) | Yes, (wireless) |
| Standby | 139 hr | 105 hr |
| Watching video | 28:44 hr | 13:15 hr |
| Web browsing | 18:32 hr | 07:28 hr |
| Wireless charging | Yes (50 W) | Yes (15 W) |
Benchmarks
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| CPU | 1184036 | 380634 |
| Compute Score (GPU) | 24461 | 6699 |
| Data manipulation | 14971 | — |
| GPU | 1490867 | 187261 |
| Graphics score | 2699 | — |
| Graphics test | 20 FPS | — |
| Memory | 402813 | 186352 |
| Multi-core score | 10732 | 3255 |
| Photo editing | 26644 | — |
| Section 1 | 56 FPS | — |
| Section 2 | 47 FPS | — |
| Section 3 | 39 FPS | — |
| Single-core score | 3607 | 1259 |
| Stability | 78% | — |
| Total score | 4008294 | 1017773 |
| UX | 930578 | 263526 |
| Video editing | 6678 | — |
| Web score | 15531 | — |
| Writing score | 20874 | — |
Connectivity
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| 2G network | GSM 850/900/1800/1900MHz | GSM 850, 900, 1800, 1900 MHz |
| 3G network | WCDMA 1/2/4/5/6/8/19 | WCDMA Band 1, 2, 4, 5, 8 |
| 4G network | LTE 1/2/3/4/5/7/8/12/13/17/18/19/20/25/26/28/30/32/34/38/39/40/41/42/48/66/71 | LTE 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 |
| 5G support | Yes | Yes |
| Bluetooth features | LE | LE, A2DP |
| Bluetooth version | 6.0 | 5 |
| DisplayPort | Yes | — |
| GPS | GPS, GLONASS, Beidou, Galileo, QZSS, NAVIC | GPS, GLONASS, Beidou, Galileo |
| Hybrid slot | No | No |
| Infrared port | Yes | No |
| Multi SIM mode | Standby | Standby |
| NFC* | Yes | Yes |
| Number of SIM* | 2 | 2 |
| Type of SIM card | Nano | Nano |
| USB features | - Charging- USB-Storage mode- OTG | - Charging- USB-Storage mode- USB-Host mode- OTG |
| USB type | USB Type-C | USB Type-C |
| USB version | 3.2 | 3.2 |
| Wi-Fi features | - Dual Band- Wi-Fi MiMO- Wi-Fi Direct- Wi-Fi Hotspot- Wi-Fi Display | - Dual Band- Wi-Fi MiMO- Wi-Fi Direct- Wi-Fi Hotspot- Wi-Fi Display |
| Wi-Fi standard | Wi-Fi 7 (802.11 a/b/g/n/ac/ax/be) | Wi-Fi 6 (802.11 a/b/g/n/ac/ax) |
| eSIM support* | Yes | Yes |
| LTE Cat* | — | 24 |
Design and build
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| Advanced cooling | Vapor chamber | — |
| Colors | Black, Gold, Purple | Black, Silver, Gold, Red, Purple |
| Drop resistance | Good (C) · 90 drops | — |
| Fingerprint scanner | Yes, in-display | Yes, in-display |
| Frame material | Metal | Metal |
| Height | 161.42 mm (6.36 inches) | 161.5 mm (6.36 inches) |
| Rear material | Glass | Glass |
| Repairability | Good (3.69/5) | — |
| Thickness | 8.1 mm (0.32 inches) | 7.8 mm (0.31 inches) |
| Waterproof | IP69 | IP68 |
| Weight | 211 g (7.44 oz) | 200 g (7.05 oz) |
| Width | 76.67 mm (3.02 inches) | 75.6 mm (2.98 inches) |
Display
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| Adaptive refresh rate | Yes (1-120 Hz) | Yes (48-120 Hz) |
| Aspect ratio | 19.5:9 | 20:9 |
| Contrast | ∞ Infinity | ∞ Infinity |
| Display features | - DCI-P3- Always-On Display- DC Dimming | - DCI-P3- Always-On Display |
| HDR support | Yes, Dolby Vision | Yes, HDR10+ |
| Max rated brightness | 1800 nits | 1300 nits |
| Max rated brightness in HDR | 6000 nits | — |
| PPI | 450 ppi | 394 ppi |
| PWM | 120 Hz | 240 Hz |
| RGB color space | 99.9% | 98.9% |
| Refresh rate | 165 Hz | 120 Hz |
| Resolution | 1272 x 2772 pixels | 1080 x 2400 pixels |
| Response time | 3 ms | 6.2 ms |
| Screen protection | Gorilla Glass Victus 2 | Gorilla Glass Victus |
| Screen-to-body ratio | 91.2% | 88.7% |
| Size | 6.78 inches | 6.7 inches |
| Touch sampling rate | 330 Hz | — |
| Type | AMOLED | Dynamic AMOLED |
Main camera
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| 1080p video recording | Up to 120FPS | Up to 60FPS |
| 4K video recording | Up to 120FPS | Up to 60FPS |
| 8K video recording | Up to 30FPS | Up to 24FPS |
| Angle of widest lens | 116° | 120° |
| Aperture | f/1.8 | f/1.8 |
| Autofocus | Phase autofocus | Phase autofocus (Dual Pixel) |
| Camera features | - Bokeh mode- Pro mode- RAW support | - Bokeh mode- Pro mode- RAW support |
| Flash | Dual LED | Dual LED |
| Focal length | 24 mm | 26 mm |
| Image resolution | 8192 x 6144 | 4000 x 3000 |
| Lenses | 1) Standard: 50 MP2) Telephoto: 50 MP3) Ultrawide: 50 MP | 1) Standard: 12 MP2) Telephoto: 64 MP3) Ultrawide: 12 MP |
| Matrix | 50 megapixels | 12 megapixels |
| Pixel size | 1 micron | 1.8 micron |
| Sensor | Sony IMX906 | Sony IMX555 |
| Sensor size | 1/1.56" (≈ 0.64 inch) | 1/1.76" (≈ 0.57 inch) |
| Slow motion | 480 FPS (720p) | 960 FPS (720p) |
| Stabilization | Optical | Optical |
| Zoom | Optical, 3.5x | Optical, 1.1x |
Memory
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| Channels | 4 | 2 |
| Memory card | No | No |
| Memory clock | 5333 MHz | 2750 MHz |
| Memory type | LPDDR5X | LPDDR5 |
| RAM size | 12 GB | 8 GB |
| Storage size | 256 GB | 128 GB |
| Storage type | UFS 4.1 | UFS 3.1 |
Other
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| Announced | October 2025 | January 2021 |
| Bundled charger | Not included | — |
| Category | Flagship | Flagship |
| Launch price (MSRP) | $899 | $1000 |
| Release date | October 2025 | February 2021 |
| Sensors | - Hall-effect sensor- Proximity sensor- Gyroscope- Accelerometer- Ambient light sensor- Compass- Fingerprint | - Hall-effect sensor- Barometer- Proximity sensor- Gyroscope- Accelerometer- Ambient light sensor- Compass- Fingerprint |
| SAR (body) | — | 1.33 W/kg |
| SAR (head) | — | 0.54 W/kg |
| Successor | — | -Samsung Galaxy S22 Plus |
Performance
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| Architecture | - 6 cores at 3.63 GHz: Oryon Gen 3 Performance- 2 cores at 4.61 GHz: Oryon Gen 3 Prime | - 4 cores at 2.2 GHz: Cortex-A55- 3 cores at 2.81 GHz: Cortex-A78- 1 core at 2.91 GHz: Cortex-X1 |
| CPU cores | 8 (2 + 6) | 8 (1 + 3 + 4) |
| Chipset | Qualcomm Snapdragon 8 Elite Gen 5 | Samsung Exynos 2100 |
| FLOPS | ~3686.4 GFLOPS | ~765.2 GFLOPS |
| GPU clock | 1200 MHz | 854 MHz |
| GPU shading units | 1536 | 448 |
| Graphics | Adreno 840 | Mali-G78 MP14 |
| L3 cache | 12 MB | — |
| Lithography process | 3 nanometers | 5 nanometers |
| Manufacturing | TSMC | Samsung |
| Max clock | 4600 MHz | 2900 MHz |
| Neural processor (NPU) | Hexagon | Yes |
Recent User Tests
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| Date | Benchmark | Benchmark |
| 📘 2026-07-01(Seraphim) | CPU Throttle | — |
| 📘 2026-07-04(Nothing left) | AnTuTu | — |
| 📘 2026-07-06(Samuray095) | AnTuTu | — |
| 📘 2026-07-19(Mohamed selima) | AnTuTu | — |
| 📘 2026-07-31(@zokhidjonovch) | AnTuTu | — |
| 📘 2026-08-07(@zokhidjonovch) | AnTuTu | — |
| 📘 2026-08-15(YurOk) | AnTuTu | — |
| 📘 2026-08-24->Ang3L4D | AnTuTu | — |
| 📘 2025-12-08(Bahodir) | — | AnTuTu |
| 📘 2025-12-30(Asadbek M) | — | AnTuTu |
| 📘 2026-01-31(EmerickYT) | — | AnTuTu |
| 📘 2026-03-26(Danish Saifi) | — | AnTuTu |
| 📘 2026-04-18(Aziz Jr) | — | GeekBench GPU |
| 📘 2026-05-08(Arcytechsure) | — | AnTuTu |
| 📘 2026-05-30(Júnior) | — | AnTuTu |
Selfie camera
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| Depth sensor (TOF 3D) | No | No |
| Megapixels | 32 megapixels | 10 megapixels |
| Video resolution | 2160p (4K) at 60 FPS | 2160p (4K) at 60 FPS |
Software
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| OS size | 26 GB | 27.2 GB |
| OS updates | 4 years | 2 years |
| Operating system | Android 16 | Android 11 (Can be upgraded to Android 15) |
| ROM | OxygenOS 16 | One UI 7.0 |
| Security updates | 6 years | 4 years |
Sound
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| Dolby Atmos | No | Yes |
| FM radio | No | No |
| Headphone audio jack | No | No |
| Speakers | Stereo | Stereo |
DxOMark main camera tests
| Specification | OnePlus 15 | Samsung Galaxy S21 Plus |
|---|---|---|
| Bokeh | — | 70 |
| Preview | — | 60 |
| Samples | — | Photo samples of Samsung Galaxy S21 Plus from DxOMark |
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