Some of the data analysis in this thread is impressive. But remember, despite that analysis: My SIM is better than yours. My SIM is more realistic than yours. It doesn't matter which SIM you use, mine is better. My sim tires are completely realistic and yours aren't. I am doing a real world track day next week but I don't know why I bother. It is just a waste of money because my sim is more realistic than going to a real-world track. I can almost guarantee that next week I will miss an apex and that is because the real world car's physics are not as accurate as my sim. My real world tires don't heat and cool properly. I wish I could put my sim tires on my real world car so I could have driving Nirvana.