I think I know what Steven (1560) is trying to say. A trad is a further step away from virtually any other car on the road, whereas an Aero is aimed more directly at the Porsche brigade (confirmed by Russell Patterson who says he takes in more Porsches as p/ex against Aeros than all other cars).
What an Aero will always be is a more raw and traditional (if I dare use that expression) sports car than the Porsche/Ferrari/Aston brigade, though just as capable as most. Certainly as quick as most Porsches including the Turbo up to say 120mph and possibly quicker on a track (in the right hands of course) due to weight, braking and handling capabilities. I am still however pleasantly surprised at your comments regarding the GT3.
Back to Steven I think he was trying to say the difference would be more pronounced in a trad. Don't forget, Stevens' Aero is one of the more 'boring'

coupe's, not the fresh air rawness of an original beast