Besides obvious functionality of movement, switching to PuzzleBox32 Mini gives me: 

1. Higher resolution (32 bit vs 8 bit Architecture)
2. Limit switches:
   1. Isolation of the limit switch from the controller board
   2. Power is supplied via the limit switch connectors
   3. Better noise resilience
3. PWM/Enable output for Spindle control (gonna be converted to 0-10V externally)
4. Aux port for mist control