There are two generations between them. And the biggest progress isn't in the camera but in the battery.

Short answer

Xiaomi 17T Pro - Dimensity 9500, 7000 mAh, 100 W. Xiaomi 15T Pro - the same camera with a 5× telephoto, 144 Hz, lighter (210 g) and already cheaper.

Key differences

SpecXiaomi 17T ProXiaomi 15T Pro
ChipMediaTek Dimensity 9500MediaTek Dimensity 9400+
Display6.83", AMOLED, 1280×2772, 144 Hz6.83", AMOLED, 1280×2772, 144 Hz
RAM / storage12/256 GB, 12/512 GB, 12/1024 GB12/256 GB, 12/512 GB, 12/1024 GB
Rear cameras50 MP + 50 MP + 12 MP50 MP + 50 MP + 12 MP
Front32 MP32 MP
Battery7000 mAh5500 mAh
Charging100 W / 50 W wireless90 W / 50 W wireless
ProtectionIP68IP68
Thickness / weight8.25 mm / 219 g7.96 mm / 210 g
Pricecurrent pricescurrent prices

Specs come from the device pages on Smartphone.ua.

Battery

7000 vs 5500 mAh - a difference of almost 30%.

Chips

MediaTek Dimensity 9500 and MediaTek Dimensity 9400+.

Cameras

According to the device pages the setup is the same: 50 + 50 (5×) + 12 MP, a 32 MP front camera, 8K and 4K120.

Verdict: who should buy which

  • Battery life - Xiaomi 17T Pro.
  • Savings with the same camera - Xiaomi 15T Pro.

FAQ

What battery does the 17T Pro have?
7000 mAh.

Is the telephoto the same?
Yes, 5×.

How much does the 17T Pro weigh?
219 g.

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