From what I've seen personally, none of the cheaper aftermarket discs sold by other suppliers are as good as genuine Bully discs, most of them fall apart alot sooner, while the Bully discs actually get better as they wear, up until they are almost worn out. That's my experience
I am not fimilar with the bootleg disc. I have rock star discs from George bark on three clutches and have been very pleased. We are ran them all last year (about 40 races per clutch) and the thickness is still about 0.125. We are still running them this year. The clutches with these discs have performed very well. I have not noticed any performance differences in comparison to the OEM discs. I just bought three more sets when they were on sale a few weeks ago. I am stocked up if the other discs do wear or degrade.
