Could have changed in the long time since I last pushed that far in IC2, but I was always under the impression that the different Q-suit pieces give different things, the helmet is basically infinite air (possibly hunger, too), the leggings were speed, the boots were fall damage and jumping, and the chestpiece was basically a forcefield.Since when? The last time I used quantum armor it had creative flight.
But, then, most of the mod has changed since then.