ARM JIT from Aranym (1.0.2) use very similar UAE cpu engine to BasiliskII (or SheepShaver)
At now ARM JIT is 2-3 times faster than non jit. And will be more faster soon.
P.S.
My Mistake, Aranym use ARM JIT for m68k-emulation (not for ppc). It can be usefull only for BasiliskII