X2^^^^^^^^^^^^^^.....and the DMC brackets are only $95.00 so you should have some money left overThe ACE doesn't use the base plate's. I cant say if it will be more comfortable or not as I have never sat in that model's seat. I recall that it has deeper bolsters so it might hold the driver in better....but I am not 100% certain on that.
If it were me and someone handed me a free OEM RZR seat in good shape, I'd sell it and put that money into the Desert Craft Suspension Seat Brackets. It made a night/day positive comfort difference for me.