My opinion, '92+ Why? From a purely stock prospective. 1) single plate clutch 2) updated wheel bearings 3) Nippondenso alternator 4) higher fuel pressure regulators (3.8bar/55.1psi) 5) higher stock rpm rev limiter (7750rpm) 6) marginally better gear ratios 7) single can exhaust 8) wider rear wheel offset 9) painted lower bumpers & rocker panels 10) upgraded cam drive pulley bearings, front and rear The most desirable, street legal, 348 = Competizione
Not talking about differences, talking about worthwhile differences. For me, it's the seats. Otherwise.....nah.