Either. I'm an inch taller and my TE2 - which is comparable to the AP - fits just fine. I think between the two it really comes down to trimming/fit, not the base armor.
Heck I have some leg parts in RT, TE2, and FX. Overall dimensions are *very* similar, but what makes them fit differently is the contour of the part and how it's trimmed.
Take a look at the pix of each suit and choose what's most aesthetically pleasing, that's my advice.
As for "big", let's not forget CMANavy who at 6'4" and 265lbs got a set of TE armor to fit him. Here is a pix of him in it in sandtrooper configuration.
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