Huawei did a few cutbacks with the 5T mainly:
No OLED screen
No headphone jack
Smaller battery (3750 mAh)
More expensive at RM1,599

Xiaomi seems to better in terms of specs especially at RM1,399 for the 6/128GB version. A few concerns are:
Xiaomi product quality questionable?
Pop-out camera subject to wear & tear?

Between the two, which would u choose?

Huawei anytime

Mi 9T Pro should be the direct competitor of Nova 5T.

But I will still pick Mi 9T because of no notch, headphone jack, Snapdragon SOC, bigger battery.

i would prefer nova 5t over mii , as nova is still under Huawei company and quality is assured.

1. As far as i concern both display technologies (LCD & OLED) have their own pros and cons so it would not be a problem for LCD.
2. Nova 5T has bigger 8GB RAM over 6GB RAM for 9T .
3. Battery sizing of 3750 and 4000 mAh is not significant different for me.
4. Pop out camera might be having trouble (own opinion) as it involve mechanical movement ,as stated above, subjected to wear and tear. Punch hole camera does not affect the looking appearance of entire phone body, including playing game or whatsoever , merely depending on self favor.