AFAIK In the "EBC hierarchy of crapness" :
1) I know track day mates who think EBC Greenstuff has similar effect to replacing your brake pads with some wet leaves
2) I know other track day mates who hate Yellowstuff and say it falls apart under hard use. I can't vouch for this personally, since I have only seen it fall apart under moderate use on a damp track day..
3) I don't know much about Redstuff but suspect it fits into the middle of the EBC hierarchy of crapness
Maybe somebody can confirm more precisely whdther its upper/lower middle of the crapness scale?
One of the problems with EBC is that they apparently vary the friction coefficient hugely between batches - so much for standards.
Cheers,
TB