realme 15x 5G vs Samsung Galaxy S21 Ultra
28.9Performance37.2
50.4Display56.3
37.9Camera72
75.6Battery46.4
46.7Features78.7
7 spec wins — realme 15x 5G5 spec wins — Samsung Galaxy S21 Ultra
InnoReviews verdict
Samsung Galaxy S21 Ultra wins this phone face-off, 53.9 to 46.1, pulling ahead mainly in camera (+34) and features (+32). realme 15x 5G still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the realme 15x 5G
- Stronger battery score: 76 vs 46
- 140% higher Wired charging: 60 W vs 25 W
- 40% higher capacity: 7,000 mAh vs 5,000 mAh
- 25% higher Front camera: 50 MP vs 40 MP
- 20% higher Refresh rate: 144 Hz vs 120 Hz
Reasons to pick the Samsung Galaxy S21 Ultra
- Stronger performance score: 37 vs 29
- Stronger display score: 56 vs 50
- Stronger camera score: 72 vs 38
- Stronger features score: 79 vs 47
- 116% higher Main camera: 108 MP vs 50 MP
Display
| Spec | realme 15x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Screen size | 6.81 ″ | 6.8 ″ |
| Panel type | IPS LCD | LTPO AMOLED |
| Resolution | 720x1570 | 3200x1440 |
| Pixel density | 254 ppi | 515 ppi+103% |
| Refresh rate | 144 Hz+20% | 120 Hz |
| Peak brightness | 1,200 nits | 1,500 nits+25% |
| Screen-to-body | 87.6 % | — |
Performance
| Spec | realme 15x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Chipset | MediaTek Dimensity 6300 | Samsung Exynos 2100 |
| AnTuTu | — | 783,817Bottom 19% |
| AnTuTu 11 (CPU) | — | 263,424Bottom 14% |
| AnTuTu 11 (GPU) | — | 126,989Bottom 29% |
| AnTuTu 11 (Memory) | — | 165,563Bottom 31% |
| AnTuTu 11 (UX) | — | 227,841Bottom 17% |
| Geekbench 6 (single) | — | 1,430Top 48% |
| Geekbench 6 (multi) | — | 3,550Bottom 48% |
| RAM (max) | 8 GB | 12 GB+50% |
| Storage options | 128/256GB | 128GB / 256GB / 512GB |
| Storage type | — | UFS 3.1 |
Camera
| Spec | realme 15x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Main camera | 50 MP | 108 MP+116% |
| Main aperture | f/1.8 | f/1.8 |
| Ultra-wide | — | 12 MP |
| Telephoto | — | 10 MP |
| Optical zoom | — | 10 x |
| Max video | 1080p@30fps | 8K@24fps |
| Front camera | 50 MP+25% | 40 MP |
| OIS | — | Yes |
Battery
| Spec | realme 15x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Capacity | 7,000 mAh+40% | 5,000 mAh |
| Wired charging | 60 W+140% | 25 W |
| Wireless charging | — | 15 W |
Design
| Spec | realme 15x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Weight | 212 g+7% | 228 g |
| Thickness | 8.3 mm+7% | 8.9 mm |
| IP rating | IP66/IP68/IP69 | IP68 |
| Frame material | — | Aluminum |
Connectivity
| Spec | realme 15x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 5 | Wi-Fi 6E |
| Bluetooth | 5.3 | 5.2 |
| NFC | No | Yes |
| USB | USB Type-C | USB-C 3.2 |
| eSIM | — | Yes |
Software
| Spec | realme 15x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| OS at launch | Android 15 | Android 11 (One UI 3.1) |
| OS update pledge | — | 4 years |
Audio
| Spec | realme 15x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Stereo speakers | — | Yes |
| 3.5mm jack | No | No |
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