i'm working on a building a rover and would like some advice on selecting motors. In particular, i want to understand the difference between precision and planetary gear motors. My robot will way about 10-15lbs i think and would like it to be responsive and quick. I have two sabertooth 2x12 motor controllers (which can supply up to 12amps). I have been looking at these motors and i am not sure which is better choice for my application.
These are the two sets of motors i am thinking about. https://www.servocity.com/html/precision_robotzone_gear_motor.html https://www.servocity.com/html/3-12v_precision_planetary_gear.html
googling does provide some info on planetary gears, but the application of these two is still is unclear to me.