I've drivin a hard top with a helment and my sunroof with a helment they feel pretty much the same. It just that if you go past like 80-90 mph the wind creeps in really hard so i have my sun roof open all the time, and also if you planning to by a sun roof make sure it doens't leak water through the seals. Thats is whats happening to mind and it sucks. Everytime i slam on the breaks i would have a water fall
