Hi dose any one know what/is there a difference between

M542 CNC Stepper Motor Driver 2/4 Phase 256 Microstep Multiple Subdivision 4.5A and the

CNC Microstep Stepper Motor Driver 2M542 4.2A Controller 24-50V DC Nema17,23,34 apart from the amps

would i be able to fit the 2m542 as i have the m542 in my machine at the moment. or is the i diffident one i can use (but it must be simple to set up and swap over)

Thanks for looking and if you can help Tom