Just gave the demo a try. Gonna write a quick impression post.
1. Graphics
Cartoony. Sluggish. Slow. Made my (a bit old) P4 2.4GHz / 512MB DDR / 9800 Radeon Pro setup suffer pretty badly. It's better when you're alone on the time trial and no other cars are around, but what's the point there?
I can run LFS fine on a full grid without a hitch, even 3-4 cars on the track in GTR gives me 15-20fps.
2. Audio
Sampled. Need I say more? Nah, but seriously, I think the GTR sounds are ok for being sampled, but not in my lifetime would I prefer these over LFS. The car engine just doesn't sound alive in GTR, you can't tell how much stress it's going thru.. it's just.. fake.
3. Menus and control setup
Same old confusing menus from the previous GTR/GTL titles here. I don't like them one bit. I still can't configure my clutch in to the game from my second wheels pedals, I have no bloody idea why. The game asks me to choose which wheel I want to use. ARRRGH.
4. Physics and the "feeling"
Better than GTR and GTL I suppose. Still no default presets for DFP, which frankly pisses me off. The physics still feel fake, which wasn't really a surprise to me. I did feel pretty good a few times while hammering that Lambo in to corners, but for most of the time I was biting my lip and thinking "not like this Simbin, not like this". It doesn't feel like YOU are driving the car, it feels mostly like the game engine is driving the car for you.
5. Final words
I didn't have high expectations about GTR2, and I found nothing new from this so called sim.
Call this as an LFS fanboy post if you must, but I just can't stand sims that claim to have "ground-breaking physics engine (that's straight from the readme.txt)" while they clearly don't. I've always considered anything ISI physics based to be made for the mass public, not for the hardcore simmers. In GTR you are being made feel good for driving even if you don't deserve it.
I'm not going to buy this title. It's not a hardcore sim, which are the only sims I'm after for. Flame ahead, this is how I feel about these sims and no GTR fanboy post will change my opinion untill THEY get their sim right.