realme P4x 5G vs Samsung Galaxy S21 Ultra
46.6Performance37.2
52.9Display56.3
29Camera72
71.3Battery46.4
52Features78.7
8 spec wins — realme P4x 5G11 spec wins — Samsung Galaxy S21 Ultra
InnoReviews verdict
Samsung Galaxy S21 Ultra wins this phone face-off, 53.9 to 49.8, pulling ahead mainly in camera (+43) and features (+27). realme P4x 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 P4x 5G
- Stronger performance score: 47 vs 37
- Stronger battery score: 71 vs 46
- 80% higher Wired charging: 45 W vs 25 W
- 40% higher capacity: 7,000 mAh vs 5,000 mAh
- 30% higher AnTuTu 11 (CPU): 342,564 vs 263,424
Reasons to pick the Samsung Galaxy S21 Ultra
- Stronger display score: 56 vs 53
- Stronger camera score: 72 vs 29
- Stronger features score: 79 vs 52
- 400% higher Front camera: 40 MP vs 8 MP
- 116% higher Main camera: 108 MP vs 50 MP
Display
| Spec | realme P4x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Screen size | 6.72 ″ | 6.8 ″+1% |
| Panel type | IPS LCD | LTPO AMOLED |
| Resolution | 1080x2400 | 3200x1440 |
| Pixel density | 391 ppi | 515 ppi+32% |
| Refresh rate | 144 Hz+20% | 120 Hz |
| Peak brightness | 1,000 nits | 1,500 nits+50% |
| Screen-to-body | 86.5 % | — |
Performance
| Spec | realme P4x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Chipset | MediaTek Dimensity 7400 Ultra | Samsung Exynos 2100 |
| AnTuTu 11 | 876,440+12%Bottom 33% | 783,817Bottom 22% |
| AnTuTu 11 (CPU) | 342,564+30%Bottom 33% | 263,424Bottom 17% |
| AnTuTu 11 (GPU) | 103,831Bottom 22% | 126,989+22%Bottom 33% |
| AnTuTu 11 (Memory) | 163,676Bottom 33% | 165,563+1%Bottom 35% |
| AnTuTu 11 (UX) | 266,369+17%Bottom 32% | 227,841Bottom 20% |
| Geekbench 6 (single) | — | 1,430Top 46% |
| Geekbench 6 (multi) | — | 3,550Bottom 50% |
| RAM (max) | 8 GB | 12 GB+50% |
| Storage options | 128GB / 256GB | 128GB / 256GB / 512GB |
| Storage type | UFS 3.1 | UFS 3.1 |
Camera
| Spec | realme P4x 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 | 4K@30fps | 8K@24fps |
| Front camera | 8 MP | 40 MP+400% |
| OIS | No | Yes |
Battery
| Spec | realme P4x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Capacity | 7,000 mAh+40% | 5,000 mAh |
| Wired charging | 45 W+80% | 25 W |
| Wireless charging | — | 15 W |
Design
| Spec | realme P4x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Weight | 208 g+9% | 228 g |
| Thickness | 8.4 mm+6% | 8.9 mm |
| IP rating | IP64 | IP68 |
| Frame material | Plastic | Aluminum |
Connectivity
| Spec | realme P4x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 6 | Wi-Fi 6E |
| Bluetooth | 5.4 | 5.2 |
| NFC | No | Yes |
| USB | USB Type-C | USB-C 3.2 |
| eSIM | — | Yes |
Software
| Spec | realme P4x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| OS at launch | Android 15 (realme UI 6.0) | Android 11 (One UI 3.1) |
| OS update pledge | 2 years | 4 years+100% |
Audio
| Spec | realme P4x 5G | Samsung Galaxy S21 Ultra |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |
Related comparisons
realme P4x 5Gvs TECNO POVA 6 Pro 5GVSrealme P4x 5Gvs Blackview XPLORE X1 ProVSrealme P4x 5Gvs Motorola Moto G Stylus (2025)VSrealme P4x 5Gvs realme NARZO 70 Turbo 5GVSSamsung Galaxy S21 Ultravs realme P4 Power 5GVSSamsung Galaxy S21 Ultravs TECNO POVA Curve 2 5GVSSamsung Galaxy S21 Ultravs Motorola Edge 50 ProVSSamsung Galaxy S21 Ultravs iPhone 16eVS