Thanks, I was trying to fiddle with the 'cobra' function in rebug although it doesn't switch back to 'PS2Emu', but the games ran fine, some do better on the ps3 than on PCSX2.Simply put no. They run pretty much the same. They both use the same methods for mounting and running games. However you may find that Cobra can break certain games as I certainly have. Though that was a few versions back to say the least.... if you find a problematic game while using cobra try either disabling cobra (rebug will let you toggle it) or installing a non cobra CFW and seeing if the issue persists. Of it does the game dump is likely bad. Find/make a new copy. You may also find some games work with cobra that don't work without.