So I've been playing Grid and a few other of the Codemasters games, and while I'm having a blast, I see that they're usually termed "arcade" style games rather than simulations. What would a "real" simulation have that these games lack, or how would it be different? Is it a matter of something like being able to fully customize the car and see changes in how it handles, vs. the way Grid is designed where there's a bunch of cars, but you can't change anything about them? Not to mention the difficulty settings...on "normal" I have to admit I feel like I'm driving a tank when I hit other cars...