I bought a pair of H20-10s and traded them for a pair of H10-13s. The head band on the 20-10 extends away from your head and while a very comfortable neoprene type "pillow" rests on your head, the remainder of the head band is 2 inches above my head. This probably doesn't make any sense but if you look at em you'll see. In the end there was too much headset further away from my head and the headset had a tendency to move around, worse in turbulence. The ear cups are also bigger on the 20-10 which I didn't really need/want however the gel pads aren't flat but molded to the average Joe and create a nice seal. I ended up trading for the H10-13s and really glad I paid for the ENC. When I turn it off in cruise, idle, whatever, it's night and day.