I have the Yokohama Advan Fleva V701 currently on aftermarket but stock size 17x7 wheels, and previously had the Firestone Firehawk Indy 500s. I much prefer the Yokohamas because they have better turn in and and crisper steering response, which was my goal in getting a tire. The first choice for that would have been the original equipment Bridgestone Potenza RE050As, but they are of course discontinued. The Indy 500s may have as much ultimate grip as the Yokohamas, but the steering feel is a bit mushy and vague when you push them, which I really disliked.
I have not autocrossed either one, but based on my experience on the street, I suspect that the Yokohamas would do much better.