I'm not using the extended magazine. It's the 2.0 compact. My pinky finger goes about 1/8 inch off the bottom of the magazine on the compact. But I'm still able to comfortably put it around the grip. So there is a grip difference in the area of the bottom of the pistol. That may be where the crucial difference is. Also, I had the occasion today where I hadn't chambered a round, believing there was a chambered, pulled the trigger, and had the infamous flinch - and the front of the pistol/barrel moved downward a bit. A telling sign of overcompensating for expected recoil.