I assume you have a 4 player cab and player 1/2 have a UltraStik? Either way, it really doesn't matter I wouldn't think. The wiring harness for the UltraStik is an extra cost so that may be a reason for you or if you plan on using only MAME, I believe the ipac4 is setup for default MAME controls already so you wouldn't have to do anything extra there. Good luck either way.