The clamp is slightly tighter but has never bothered me. Some people complain about the little pad in the middle of the headband that rests on top of your head creating a little pressure point, but I have found as long as you adjust the headband length accordingly it's a none issue. I don't even notice it's there anymore, and it helps prevent them from sliding forward or backward. They're actually surprisingly light and have a very durable feel to them. I'm just afraid to get fingerprints/scratches on the (very sexy) titanium nameplate.
They are rather unforgiving on the high end music-wise, but in regards to gaming everything is ultra-crisp and will probably have some of that DT 990 sparkle you like.