mulegolf šJust about to head over to GG right now in fact.
I've tried those Maxfli balls. Feel is firmer than the ProV1x. Maybe not as long either. For me anyway.
I've got a couple boxes of the MaxFli Tri-Fli....very nice 3 pc. ball, but not urethane.
ProV1x is supposed to be a firmer feeling ball, but for some reason, it seems soft to me & the Prov1 seems much too soft and doesn't go as far(for me). Yes, odd.