Anani Masu said:
I think it looks closer to the FO2 APA than the FOT armor.
I have been working on modeling the F2 APA, and did a number of studies from the limited amount of images available of the Enclave armour. Most of what we can see in detail is only the area above the shoulders.
Forehead: F2 APA helmet forehead is quite recessed. However, the shallowness of the area above the eyes makes it seem unrealistic to fit a head in such little space . New Enclave forehead is smooth and dome-like, and has more space to fit a proper human head. The protruding tubes behind the head are obviously different.
Face: F2 APA looks more skull-like, and has got tubes also coming out from both sides of the cheek. New armor has none (visible). F2 APA also has some coiled wire widget for left ear piece. The face of F2 APA looks more like some jet engine intake, new one looks more protruded: like a snout.
Shoulder: From what I can tell, the close up rendered armour and the in-game version are different. In the close up, shoulder piece and collar/back are separate. The collar/back piece seems to be the prominent piece, and shoulders are smaller, hidden beneath it. The in-game version shows the shoulders to be one single piece combined with the collar/back, like one flexible mass. Which version is correct, hard to tell; but the main thing is that the iconic APA look comes from the neck-less imposing collar. The new Enclave shoulders are more like separate pieces, a bit like FOT armour.
Exposed joints: F2 APA has got exposed bits in the elbows, knees and waist that look like beige/brown coloured padded material. New Enclave armour only has exposed joints in the elbows and groin area, plus a belt around the armour-plated waist.
You can say the new Enclave armour borrows elements from both FOT and F2 armours, but the end result looks nothing like the iconic classic. The classic look of the F2 APA is hunched shoulders, and bug-like eyes (kind of like an armoured beetle). It also looks a bit like the coats worn by nazi troopers, with high collar and what-not. If you remove the helmets, both BOS and Enclave armour in F3 look very similar.
Edit: Fallout 3 Enclave Armor pictures from Anani Masu. Fallout 2 Advanced Power Armor pictures from The Vault, contributed by Ausir.