Don't have any idea about the Motor Guide but them and everyone else copies each other. With that said, the Minn Kota has 2 setting for the Auto Pilot, one works better than the other one, maybe the MG has the same. Neither are perfect but I wont be without a Terrova, haven't had a footpedal laying on the deck on my boat in years.
Good luck, hope you get it worked out.