Samsung Galaxy S21 Ultra vs vivo X300 Ultra and X300 FE
By SpecPair Editorialphones
Verified specs·AI-assisted analysis·Editorially reviewed
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The Verdict
The Samsung Galaxy S21 Ultra and vivo X300 Ultra and X300 FE sit in the same category and end up appealing to slightly different buyers. Samsung Galaxy S21 Ultra stands out for 100x space zoom with 10x optical telephoto, while vivo X300 Ultra and X300 FE is praised for exceptional camera system with 3x telephoto and strong low-light performance. Use the side-by-side spec table below to compare cameras, displays, battery life and connectivity in detail and decide which one fits your priorities.
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Who Should Buy
Buy the Samsung Galaxy S21 Ultra if…
- →100x Space Zoom with 10x optical telephoto
- →108 MP main sensor with excellent detail
- →S Pen support (first S-series to do so)
Buy the vivo X300 Ultra and X300 FE if…
- →Exceptional camera system with 3x telephoto and strong low-light performance
- →Industry-leading 4500 nits display brightness for excellent outdoor visibility
- →Fast 80W wireless charging and 80W wired charging
Pros & Cons
Samsung Galaxy S21 Ultra
Pros
- 100x Space Zoom with 10x optical telephoto
- 108 MP main sensor with excellent detail
- S Pen support (first S-series to do so)
- 1440p 120Hz LTPO adaptive display
- 5000 mAh battery with all-day endurance
Cons
- Heavy at 227 g
- Snapdragon 888 can overheat under load
- S Pen sold separately, no silo slot
- Slow 25W charging for the class
- No charger or earbuds in the box
vivo X300 Ultra and X300 FE
Pros
- Exceptional camera system with 3x telephoto and strong low-light performance
- Industry-leading 4500 nits display brightness for excellent outdoor visibility
- Fast 80W wireless charging and 80W wired charging
- Robust IP69 water and dust resistance
- Flagship Snapdragon 8 Elite processor with 16GB RAM
- Large 6000mAh battery for extended usage
Cons
- Premium pricing likely exceeds $1200
- Heavy at 220g may feel cumbersome for extended use
- No microSD card expansion typical of flagship phones
- Limited availability outside select markets
- FE variant specs not fully detailed in launch materials
Full Specifications
| Spec | Samsung Galaxy S21 Ultra | vivo X300 Ultra and X300 FE |
|---|---|---|
| Software | Android 11, One UI 3.1 | — |
| Body | ||
| Weight | 227 g | — |
| Material | Aluminum frame, Gorilla Glass Victus | — |
| IP rating | IP68 | — |
| Dimensions | 165.1 x 75.6 x 8.9 mm | — |
| Camera | ||
| Main camera | 108 MP, f/1.8, OIS | 50MP f/1.6 with OIS |
| Front camera | 40 MP, f/2.2 | 32MP f/2.0 |
| Video | 8K@24fps, 4K@60fps | — |
| Periscope | 10 MP, f/4.9, 10x optical zoom | — |
| Telephoto | 10 MP, f/2.4, 3x optical zoom | 50MP f/2.6 3x optical zoom |
| Ultrawide | 12 MP, f/2.2 | 50MP f/2.0 120-degree |
| Memory | ||
| RAM | 12 GB | — |
| Storage options | 128 GB, 256 GB, 512 GB | — |
| Battery | ||
| Capacity | 5000 mAh | 6000mAh |
| Charging | 25W wired | — |
| Wireless charging | 15W wireless | — |
| Charging Speed | — | 80W wired |
| Wireless Charging | — | 80W |
| Display | ||
| Size | 6.8 inches | 6.82 inches |
| Type | Dynamic AMOLED 2X, LTPO | AMOLED |
| Resolution | 3200 x 1440 | 1440 x 3168 pixels |
| Refresh rate | 120Hz | 120Hz |
| Brightness (nits) | 1500 | — |
| Brightness | — | 4500 nits peak |
| Processor | ||
| CPU | Octa-core (1x2.84 GHz + 3x2.42 GHz + 4x1.8 GHz) | — |
| GPU | Adreno 660 | — |
| Chipset | Qualcomm Snapdragon 888 | — |
| Connectivity | ||
| 5G | — | |
| NFC | — | |
| USB | USB-C 3.2 | — |
| Wi-Fi | Wi-Fi 6 | — |
| Bluetooth | 5.2 | — |
| Design | ||
| Colors | — | Titanium Black, Titanium Gray, Titanium White |
| Weight | — | 220g |
| IP rating | — | IP69 |
| Performance | ||
| RAM | — | 16GB |
| Chipset | — | Qualcomm Snapdragon 8 Elite |
| Storage | — | 512GB |
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Spec data verified from manufacturer sources. Analysis AI-assisted and editorially reviewed. How we compare · Last verified
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