Originally Posted by Jhill

Hmm that's a lot closer then when I had to decide. I've never used the Michelin so I can't compare the only thing I can say I've heard is the s04 hold their grip more consistently through their lifespan. Again I can not confirm this it is just something I have heard from users that have used both, the mich are grippier when new but after two to three track days the grip drops off whereas the s04 stays more consistent. I'm looking into track day two soon and it's been some mi between so I guess I'll have a better idea how they age fairly soon. I don't think you'll be unhappy with either though.