Well, I will tell you I have both stocks for my SuperNova tactical and I prefer the Comfortech. I love a good pistol grip on rifles, but for some reason I just don't them on Shotguns. Also, my defensive round is a 3 1/2" 00 buck shell with 18 pellets in it. If I shot that with the pistol grip stock I would do more damage to myself than my attacker.
One thing you should note, you cannot put a Benelli gel pad on the pistol grip stock, it doesn't fit. Also, for some reason the Supernova comfortech stock comes without a gel pad, so I added one immediately. You can buy them at www.e-gunparts.com
All my .02 of course.