What Dave H said.

Just pay attention to kV in your case

There are things like 2 pole, 4 pole or 6 pole motors for cars.
Then there is slotted and slotless 2 pole motors.
There is rotor diameter and length to be considered.
The diameter of the motor shaft that goes through the rotor that makes a difference.
Is the rotor segmented or sintered?
Is the rotor kevlar or carbon wrapped?
Sensored vs Sensorless.
Delta or Wye winds.


There is more, but you get the point.