Which motor is better?

I saw your other thread , it would be better not to start a new topic then you get better answers, just my 2 cents.

I would say your main problem is 1:4 gearing on 8" wheels and not the 6374 motor :man_shrugging:. I personally don’t have @moon drives so I don’t know the highest possible gearing for your batch of drives.

Or change your tires to 6.5" or 7" for more torque.

You need between 80-100 motor amps for 6374 for good torque on MTB. Overheating is often a problem. If you don’t want to take breaks when it’s hot outside you can always ride with lame 50A and stay cool.