Right now BB does not carry the extra slim fits in non-iron fabrics, which does make a difference from some of the BR shirts.
I recently spoke to a sales associate at BB who said that the extra slim fit non-iron line will (hopefully) debut this fall, however.
Depends. If you're wearing a BBBF in a reasonable fashion (i.e. not like TB himself wears suits), then yes. If you size up in BBBF and hem the pants to a normal break, then it is just a well-made, slim-fitting suit.
Of course, in that case, you are arguably missing the point of Thom Browne. But who gives a **** about that.