RPCS3 FAQ

pcsx2 is LLE-ed, so its slow? then if there were a HLE ps2 emu, would it be faster?

I believe that is what you meant. Faster doesn't mean better. And the answer is yes, it would be faster, but making an HLE PS2 emulator would be insane because of the PS2 hardware design. Almost impossible to achieve a decent accuracy I'd say, it'd never get good.

Also, just FWIW, HLEing makes the BIOS files unnecessary. You just emulate its behavior.