Well, there were three different basic noses: The aero, the old notchback, and the new notchback. To complicate things further, some notchbacks came with the aero nose, and the Indy aero nose, while appearing identical to the later aero noses, is actually slightly different. Then there's the molding question. The GT aeros game with smooth molding on the corner of the nose, the rest of the aeros came with grooved moldings. So, I think this is a complete listing:
'84-'86 standard nose, not aero, grooved molding integral with nose, blocky black "bumper" pads.
'87-'88 Coupe nose, smooth molding wraps entirely around nose
'84 Aero nose, Indy only, grooved molding, molding was bolted to nose.
'85 Aero, GT, grooved molding integral with nose
'85-'87 Aero, SE/V6 models mostly, integral grooved molding, same as '85 GT. Some 4-cyls are documented with the aero nose, but very, very rare.
'86-'88 Aero, GT only, smooth molding is integral with nose
All of the noses are interchangeable, though the aero looks funny on a non-aero body because of the lack of ground effects.
JazzMan