I have a Manaro in Gran Turismo 4, and in a 1500m drag with a 2002 Chevy Camaro SS, it killed it from about 0-400m, but then at about 110mph, the camaro slowly caught up and won by about 50m at the end, going 169 (mph) and the monaro at 157.
Probably because the camaro is more aerodynamic and has much taller gears.
So, for Street, Monaro is better, plus it looks and sounds a lot cooler.