Having a bit of experience with both the CZ magazine conversion trigger guard and also hinged floor plates in the Howa mini, I would say that if you only run factory ammo you would be fine with the CZ magazine option.
If on the other hand you handload longer C.O.A.L. to take advantage of better bullets than you really need to run one of the floor plate options that allow the longer bullet seating depths. Fortunately there are multiple options available to suit most people's needs.
