realme 15 5G vs Samsung Galaxy S21 Ultra
46.7Performance37.2
88.3Display56.3
49.8Camera72
79.8Battery46.4
73.3Features78.7
7 spec wins — realme 15 5G3 spec wins — Samsung Galaxy S21 Ultra
InnoReviews verdict
realme 15 5G wins this phone face-off, 64.9 to 53.9, pulling ahead mainly in battery (+33) and display (+32). Samsung Galaxy S21 Ultra still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the realme 15 5G
- Stronger performance score: 47 vs 37
- Stronger display score: 88 vs 56
- Stronger battery score: 80 vs 46
- 333% higher Peak brightness: 6,500 nits vs 1,500 nits
- 220% higher Wired charging: 80 W vs 25 W
Reasons to pick the Samsung Galaxy S21 Ultra
- Stronger camera score: 72 vs 50
- Stronger features score: 79 vs 73
- 116% higher Main camera: 108 MP vs 50 MP
- 50% higher ultra-wide: 12 MP vs 8 MP
- 14% higher Pixel density: 515 ppi vs 453 ppi
Display
| Spec | realme 15 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Screen size | 6.8 ″ | 6.8 ″ |
| Panel type | AMOLED | LTPO AMOLED |
| Resolution | 1280x2800 | 3200x1440 |
| Pixel density | 453 ppi | 515 ppi+14% |
| Refresh rate | 144 Hz+20% | 120 Hz |
| Peak brightness | 6,500 nits+333% | 1,500 nits |
| Screen-to-body | 94 % | — |
Performance
| Spec | realme 15 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Chipset | MediaTek Dimensity 7300+ | Samsung Exynos 2100 |
| AnTuTu | — | 783,817Bottom 22% |
| AnTuTu 11 (CPU) | — | 263,424Bottom 17% |
| AnTuTu 11 (GPU) | — | 126,989Bottom 33% |
| AnTuTu 11 (Memory) | — | 165,563Bottom 35% |
| AnTuTu 11 (UX) | — | 227,841Bottom 20% |
| Geekbench 6 (single) | — | 1,430Top 46% |
| Geekbench 6 (multi) | — | 3,550Bottom 50% |
| RAM (max) | 12 GB | 12 GB |
| Storage options | 128/256GB | 128GB / 256GB / 512GB |
| Storage type | UFS 3.1 | UFS 3.1 |
Camera
| Spec | realme 15 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Main camera | 50 MP | 108 MP+116% |
| Main aperture | f/1.8 | f/1.8 |
| Ultra-wide | 8 MP | 12 MP+50% |
| Telephoto | — | 10 MP |
| Optical zoom | — | 10 x |
| Max video | 4K@30fps | 8K@24fps |
| Front camera | 50 MP+25% | 40 MP |
| OIS | Yes | Yes |
Battery
| Spec | realme 15 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Capacity | 7,000 mAh+40% | 5,000 mAh |
| Wired charging | 80 W+220% | 25 W |
| Wireless charging | — | 15 W |
Design
| Spec | realme 15 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Weight | 187 g+18% | 228 g |
| Thickness | 7.7 mm+14% | 8.9 mm |
| IP rating | IP68/IP69 | IP68 |
| Frame material | — | Aluminum |
Connectivity
| Spec | realme 15 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 5/6 | Wi-Fi 6E |
| Bluetooth | 5.4 | 5.2 |
| NFC | — | Yes |
| USB | USB Type-C | USB-C 3.2 |
| eSIM | — | Yes |
Software
| Spec | realme 15 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| OS at launch | Android 15 (realme UI 6.0) | Android 11 (One UI 3.1) |
| OS update pledge | — | 4 years |
Audio
| Spec | realme 15 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |
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