The main thing is that this is a bilam suit. It has 2 layers vs a trilam which has three. It's just an extra layer of thickness to your suit which makes it better suited to the stresses of diving. But I'm not sure if it really makes much of a difference. Of course, I don't do any penetrations on wrecks and I'm careful on rocky surfaces. The nexgen does have rubber pads on the kness so you're covered there. If you're cautious with your suit, you should have no problems.
I don't think there is any difference in performance but like I said, the issue may be durability.
I don't think there is any difference in performance but like I said, the issue may be durability.