Funnily enough, i'm currently porting all GT1 car logos to GT2.
So i've had a chance to look through the demo car logos and also the final game's other regions's logos (I'm playing on PAL btw, which has the worst logos imo).
So yeah, for the Prelude, it's the exact same model you're used to, except it's called the Prelude Type S in Japan and Europe. The logo is still used in those regions for the final game.
The demos have some logos that are better than the final game too. For some reason, the final game lost their official typography and I think that kinda breaks the "immersion".
The most obvious example of typography being lost is the Peugeot 106 Rallye and S16 logos which had their true typography used in the demos, while the final game uses a kind of pointy, non-serif times new roman. Which makes no sense to me.
The Audi A3 is actually the A3 1.8T Sport
the Golf GTI uses the official typography as well instead of the full caps GOLF the final game used.
Also, all Civic models other than the Type-R have their official logos on the JP region, which sucks for PAL that has the worst Civic logos possible.
Beta also have the Mugen CR-X Pro.3 (the green DelSol) as the Mugen CR-X delSol. So I imported that as well.
The NSX Type R also has a better logo in the demo. It's the NSX-R logo with a black R with white outline.
The demos also have a 3rd unused Mitsubishi Minica logo. For the Minica Dangan-4 which is a 4WD version of the Minica Dangan. However we have that, as the Minica Dangan ZZ. So yeah, an other logo I imported because it looks nice with cursive writing.
The demos also have a strangley not-so-different R33 GTR 4-door Nismo where the writings AUTECH VERSION 40TH ANNIVERSARY are reversed. (40th ann. A. V.)
Mazda Cosmo models have the 20B and 13B logo present in the demos, but not final.
I also imported the Subaru young SS logo as well since that's more accurate.
And lots more like the MR Spider (SW20) logo, the Celica XX2800GT also has one, the MR-S and MR-S concept, the GT40 road car, and the Suzuki Kei S is actually the Kei typeS.
So many logos.