The prices are almost identical. The Nothing gives you 5G and a telephoto, the TECNO a bigger battery.

Short answer

Nothing Phone (3a) - 5G, Snapdragon 7s Gen 3, a 50 MP telephoto, 50 W, cheaper. TECNO Camon 50 - 144 Hz, 6500 mAh.

Key differences

SpecTECNO Camon 50Nothing Phone (3a)
ChipMediaTek Helio G200 UltimateQualcomm Snapdragon 7s Gen 3
Display6.78", AMOLED, 1208×2644, 144 Hz6.77", AMOLED, 1080×2392, 120 Hz
RAM / storage12/256 GB, 8/256 GB, 8/128 GB8/128 GB, 12/256 GB
Rear cameras50 MP + 8 MP50 MP + 8 MP + 50 MP
Front32 MP32 MP
Battery6500 mAh5000 mAh
Charging45 W50 W
ProtectionIP68/IP69/IP69KIP64
Thickness / weight7.53 mm201 g
Pricecurrent pricescurrent prices

Specs come from the device pages on Smartphone.ua.

Chips

MediaTek Helio G200 Ultimate and Qualcomm Snapdragon 7s Gen 3. The Snapdragon 7s Gen 3 is faster and has 5G.

Cameras

50 + 8 + 50 MP on the Nothing vs 50 + 8 MP on the TECNO. A 32 MP front camera on both.

Battery

6500 vs 5000 mAh.

Verdict: who should buy which

  • 5G, telephoto, speed - Nothing Phone (3a).
  • Battery and 144 Hz - TECNO Camon 50.

FAQ

Is the front camera the same?
Yes, 32 MP.

Is the Nothing protected?
IP64.

Which is cheaper?
The Nothing Phone (3a), slightly.

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