1. They looked from distance pretty equal, otherwise then the current skins. C.E.L.L is a white and easy spottable target, while the tan is not so easy to be seen.
2. They looked like specially made for them. C.E.L.L's suit, with it's yellow, carbon and black skin looked like the actual N2 Alcatraz wears, while the ones from the Marines looked like stolen examples just with pouches, camouflage etc. And that was good, giving a little Atmosphere in this storyless Multiplayer.
Here are two comparison screens:
New:

(Note the glowing lights and how easy C.E.L.L can be spotted)
Old:

(Note how equal they look)
Just put your answer in the poll, maybe Crytek changes it back, how it was. Many things were better in the GC Version of the game...