The gameplay on display was filmed via string and a tin can. It hardly represents pcars and a better quality video could have been used to compare the two games.
It looks like the two source videos have been recorded at different FPS or something, it just looks off to me .
It's true, the pcars footage looks like it is running without AA and at like 25 FPS. It's like the guy has a much better computer and capture setup now than when he recorded the pcars stuff.
The track list for Race Room seems kinda weak and a little pricy to buy one track. I guess I was expecting a bit more.