All 1986 Aero SE cars came with the "Aero" body work. Additionally, 1986 (and 1987) Aero SE cars could be had in either four cylinder or six cylinder trim levels, designated as 2M4 or 2M6 respectively. The 1986 bumper pad cars - the last year for the bumper pads - retained the four cylinder only with 2M4 designation. The major differences aside for the looks is that basically SE was a "base" option set (example: you could only get an SE with the 14" hi-tech wheels, not the steelies like on the base of basic bumper pad cars.). Although they look near exactly the same the Aero body work on the SE is slightly different than the GT body work, in that since as mentioned this was a carry-over from the '85 GT it carries the ribbed molding body panels with engraved "PONTIAC" on the rear, not the smooth molded panels with non-"PONTIAC" molded rear. A 1986 SE with a V6 would also not be on par with a GT however. Aside from the obvious differences between notchback and fastback the GT will carry a higher level interior trim, upgraded wheels, and also higher trim suspension bits (spring ratios and such).