The S2000 posts similar numbers (e.g. high fives 0-60). Obviously, the S2000 is a convertible, so that's a big difference.
The ITR is no longer available in the States. Comparing vs the 2001 ITR, the Z posts slightly better acceleration numbers, is a lot more expensive, has a lot more horses (287 vs 195) but is heavier (3200 vs 2639); still, power-to-weight is better. The ITR is really built for the track, just like the track Z.
The RSX-S is comparable to the base version of the Z, not the track version; the RSX-S is less expensive, less horses, weighs less, power/weight worse. The RSX-S is not really a sports car. The Z - or, at least, the track Z - is.
The BMW 330 is also not a track car, but a luxury car. The Z weighs less and has more power, etc. The M3 is the version of the 3-series that is track-ready and is overall more capable but it's a lot more money (high forties to low fifties).
