Samsung Galaxy S21 Ultra vs Samsung Galaxy S25 Ultra
37.2Performance80
56.3Display66.7
72Camera74
46.4Battery65.8
78.7Features94.7
3 spec wins — Samsung Galaxy S21 Ultra17 spec wins — Samsung Galaxy S25 Ultra
InnoReviews verdict
Samsung Galaxy S25 Ultra wins this phone face-off, 74.8 to 53.9, pulling ahead mainly in performance (+43) and battery (+19). 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 Samsung Galaxy S21 Ultra
- 233% higher Front camera: 40 MP vs 12 MP
- 100% higher Optical zoom: 10 x vs 5 x
Reasons to pick the Samsung Galaxy S25 Ultra
- Stronger performance score: 80 vs 37
- Stronger display score: 67 vs 56
- Stronger battery score: 66 vs 46
- Stronger features score: 95 vs 79
- 679% higher AnTuTu 10 (GPU): 989,555 vs 126,989
Display
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 Ultra |
|---|---|---|
| Screen size | 6.8 ″ | 6.9 ″+1% |
| Panel type | LTPO AMOLED | Dynamic LTPO AMOLED 2X |
| Resolution | 3200x1440 | 1440x3120 |
| Pixel density | 515 ppi+3% | 498 ppi |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 1,500 nits | 2,600 nits+73% |
| Screen-to-body | — | 92.5 % |
| AnTuTu 10 (CPU) | 263,424Top 88% | 895,141+240%Top 10% |
| AnTuTu 10 (GPU) | 126,989Top 82% | 989,555+679%Top 13% |
| AnTuTu 10 (Memory) | 165,563Top 72% | 348,188+110%Top 19% |
| AnTuTu 10 (UX) | 227,841Top 82% | 555,097+144%Top 13% |
Performance
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 Ultra |
|---|---|---|
| Chipset | Samsung Exynos 2100 | Snapdragon 8 Elite for Galaxy |
| AnTuTu 10 | 783,817Top 65% | 2,787,981+256%Top 4% |
| Geekbench 6 (single) | 1,430Top 52% | 3,030+112%Top 8% |
| Geekbench 6 (multi) | 3,550Top 56% | 9,800+176%Top 3% |
| RAM (max) | 12 GB | 16 GB+33% |
| Storage options | 128GB / 256GB / 512GB | 256/512GB/1TB |
| Storage type | UFS 3.1 | UFS 4.0 |
Camera
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 Ultra |
|---|---|---|
| Main camera | 108 MP | 200 MP+85% |
| Main aperture | f/1.8 | f/1.7 |
| Ultra-wide | 12 MP | 50 MP+317% |
| Telephoto | 10 MP | 50 MP+400% |
| Optical zoom | 10 x+100% | 5 x |
| Max video | 8K@24fps | 8K@30fps |
| Front camera | 40 MP+233% | 12 MP |
| OIS | Yes | Yes |
Battery
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 Ultra |
|---|---|---|
| Capacity | 5,000 mAh | 5,000 mAh |
| Wired charging | 25 W | 45 W+80% |
| Wireless charging | 15 W | 15 W |
| Active use endurance | — | 13 h |
Design
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 Ultra |
|---|---|---|
| Weight | 228 g | 218 g+4% |
| Thickness | 8.9 mm | 8.2 mm+8% |
| IP rating | IP68 | IP68 |
| Frame material | Aluminum | Titanium |
Connectivity
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 6E | Wi-Fi 7 |
| Bluetooth | 5.2 | 5.4 |
| NFC | Yes | Yes |
| USB | USB-C 3.2 | USB-C 3.2 |
| eSIM | Yes | Yes |
Software
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 Ultra |
|---|---|---|
| OS at launch | Android 11 (One UI 3.1) | Android 15 (One UI 7) |
| OS update pledge | 4 years | 7 years+75% |
Audio
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 Ultra |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |
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