I've been a green stuff fan for 5 years. Had the pads on my RX-8, RX-7, and Eclipse.
Haven't used their rotors, I prefer powerslot's rotors for my street cars.
The green stuff is a very soft compound, and very easy on your rotors, a civic owner claimed he would go through a set every 6 months when he did some light track. They do have a slightly better bite, but do fade like a good OEM pad.
I've been told the red stuff has a similar feel to green stuff, but slightly less bite, and less fade.
Honestly, you'll have to test them out for yourself.