They're completely different helmets, at a completely different price point... The gt-air is basically a racing helmet, and if you don't do a lot of racing it won't be a great fit and the vents/etc are made for high speed, so street riding is not what it is suited for. The rf-1100 is a great all around street helmet and you'd probably love it. But it all comes down to fit and trying them on. I had an rf-1000 and loved it, but the rf-1100 just didn't feel right to me. It also has to do with what you ride. The rf's are made for rockets and the venting goes along with that. I always hated turning my head to the side with the rf-1000 because the air would try to rip my helmet off (I've always rode naked bikes) I just bought a qwest last week and the difference is astounding. If you ride a 919 (like it seems just about everyone here does) or anything with a naked/standard/sport touring riding position, I'd look into the quest, as its more made for that type of riding. But like I said, it all comes down to what fits you and what feels best on your head. You don't want to drop over 300 dollars on something you don't absolutely love.
Love is the feeling you get when you like something as much as your motorcycle - Hunter S. Thompson
I just mı̸̸̸̸̸̸̸̸̸̸̸̸̸̸̸̸̨ade you wipe your screen.
-2009 Suzuki GSX-R 750 Race Bike
-2007 Honda 919
-1995 Nighthawk 750 (Tboned)
-1983 KZ 440 (Sold)