I own both and they are both very good pieces. The glock is probable to fit most shooters hands as in my opinion most accurate shooters have a good size hand or combination of decent size and good muscular strong hands. The beretta you might want your hands to be well in my idea at least a little over 7 inches from the wrist to middle finger which will help you get a good grip on it and also ease the reach for flicking the safety on and off. Bigger handed people with a beretta are a plus at shooting it comftorably. Thats all I can think of now.