Realme C21 3GB
$121
Realme C21 3GB vs POCO F9 Ultra
POCO F9 Ultra
$799
| C21 3GB | F9 Ultra | |
|---|---|---|
| Price | USD 121 | USD 799 |
| Battery | 5000 mAh | 8050 mAh |
| Charging (W) | 10 | 100 |
| RAM | 3 GB | 12 GB |
| Storage | 32 GB | 256 GB |
| Chipset | MediaTek Helio G35 | Qualcomm Snapdragon 8 Elite Gen 5 (SM8850-AC) |
| Display | 6.5" • IPS LCD Mini-drop Fullscreen • 60Hz | 6.9" • AMOLED • 185Hz |
| Main Camera | 13MP | 200MP |
| Front Camera | 5MP | 32MP |
| OS | Android 10 | Android 16 |
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Key Differences
Only the differences that meaningfully separate these phones.
Price
USD 678 cheaper
C21 3GBUSD 121
vsF9 UltraUSD 799
RAM
4× more RAM
F9 Ultra12 GB RAM
vsC21 3GB3 GB RAM
Storage
8× more storage
F9 Ultra256 GB
vsC21 3GB32 GB
Battery
61% larger battery
F9 Ultra8,050 mAh
vsC21 3GB5,000 mAh
Charging
90 W faster wired charging
F9 Ultra100 W wired
vsC21 3GB10 W wired
Performance
Different chipsets
C21 3GBMediaTek Helio G35
vsF9 UltraQualcomm Snapdragon 8 Elite Gen 5 (SM8850-AC)
Display
Larger185Hz
F9 Ultra6.9″ · 185Hz
vsC21 3GB6.5″ · 60Hz
Best For
Where each phone stands out based on this comparison.
Best if you want
Lower priceRealme C21 3GB
Much lower purchase priceUSD 121
Smaller 6.5-inch display6.5″
Best if you want
More hardwarePOCO F9 Ultra
More RAM and storage12 GB RAM · 256 GB
Larger battery8,050 mAh
Faster wired charging100 W wired
Larger 185Hz display6.9″ · 185Hz
What CompareTab says about Realme C21 3GB vs POCO F9 Ultra
POCO F9 Ultra has clear advantages in memory, battery capacity and display refresh rate over C21 3GB, with 12 GB of RAM versus 3 GB, 256 GB of storage versus 32 GB, a 8050 mAh battery versus 5000 mAh, and a 185 Hz display instead of 60 Hz. It also adds a higher-resolution rear camera (200 MP versus 13 MP), optical image stabilization on the main camera, an ultrawide rear camera, and 100W charging. Realme C21 3GB, however, is around $678 cheaper and lighter at 190 g versus 235 g. The choice comes down to F9 Ultra’s extra RAM, storage, faster charging, battery capacity, and smoother display versus C21 3GB’s lower price and lighter build.
