s14 is the 95-96 240sx.
i call them the american 240 because it's rather plain looking
s14a is the 97-98 240sx.
it has the projector headlights and some other cosmetics.
it is personally my favorite.

hmm...lemme check on that forum or someone that is on it can post the url for you. obviously i have no need to go on there but i'm sure some other people go on there and know how to direct you there.