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Most lifts I've seen, the drive motor is significantly bigger than the pump motor, but, apparently that's not always true.

Pump motors will often not be reversible without some internal surgery, as they only run in one direction there's no need to have 4 terminals. Regardless of which way you connect power they'll spin the same way. It's easy to tell, see whether it has 2 terminals or 4 (with 2 of the 4 probably being shorted by a wire stub or bus bar).

Pump motors often have less cooling and a lower duty cycle than drive motors.

Both will work but you'll probably want a drive motor.
 
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