Im an iRacing subscriber and decided to try the demo of LFS and its really fun! The tire model here, although it may have some problems, if far better than the one iRacing currently have. feels a lot better. iRacing is coming out with a new, ultimately comprehensive tire model in the next couple months though so that should be good.
The main reason I will play LFS is so that I wont have to worry about my iRating and Safety rating getting destroyed. If I do a race on iRacing without a ridiculous amount of practice then i will most likely lose both safety rating and iRating. needing that much practice means I do only about 2 or 3 races a week! And i want to race more in a little more casual environment. Cant wait.