and the difference between m1144 + m1155 ect. is? cant find much info on their site
1155s have a higher temperature range, but need to be warmer to really work, and are noisier.
1144s are perfectly fine for the road...1155s more a trackday pad, in my view.
Of course you could go for something a bit more special - F4Rs are epic. It's like throwing out an anchor...your eyes hurt with the braking forces.
Just don't brake hard with someone behind you...or they'll hit you!
And get them wet, and you'll be clay-barring brake dust mess off for the following week or so!
M1144s are good for road use...and M1155s for a car that does a few track miles.