Well to stay on topic. Like Mike said, there really isnt any difference between the TE, TE2, AP, GINO, GF, and SDS other than the parts mentioned. I would also add that the detonator and shoulder straps looks different on the different armors as well. I would like to get my hands on all of them just to actually verify all of it, but from the pics I have seen they are all pretty much the same.
I can say, having seen the SDS, that it is quite thick compared to the others and very glossy as well. Also the TE is very detailed due to its styrene usage. The AP is glossy enough and somewhat more troopable than the TE due to its being made from ABS. (from what I have heard) I have never seen a GINO before. I guess that it would probably be very nice, but very thin and not wearable.
Helmets is another story... AP pulls are very tight and tend to have thin spots and made of glossy ABS. TE2 very thick and durable. Not as tight of a pull as AP but gets extra points for more correct size and nice Back / Cap. Made of styrene so painting is a must. Plus, the man has no ego.
I will post pics of my AP as soon as I can. If someones got a Gino, GF, TE, TE2, or SDS, bring em on!