I've read reviews by several new Gen4 GLOCK 21 owners who say that the Gen4 21 grip feels smaller to them than the Gen 3 G21's. According to GLOCK's own info, the Gen4 G21 without backstrap should be the same as the Gen 3 SF models. I'm wondering if it is simply the grip texture making it feel different, or if the grip angle has changed, or whether the grip is actually smaller. Is there anyone here who owns both a gen4 and gen3 G21 who could take some measurements and confirm or debunk this?? Thanks if you can.