Have had Pirelli & Continental sport in 20" on my KN and in evry day running found no difference. I suspect that the Michelin will be a slightly harder compound & the Pirelli the softest as they certainly didn't last anywhere near the milage of the Continentals.
As an aside, I have recently had fitted General Grabber UHP in the same size, they have an M&S marking so although not a full winter tyre should have some benefits when the cold comes. I have to say that since fitting they have been excellent, although a slightly softer side wall, grip in wet & dry is as good as the others. Best off is the price £520 all in fitted, so even if they only last 2/3rds of the others its still 2 sets for the price of 1.
Yes I know they are not NO or N1 rated and I have checked with my insurer & they have no problems with using them. Its a bit of an experiment really but thought that this was a good time of year to try it out.