Nah, don't get to mean.

If it's running code compiled for it's FPU it will outperform a Peg2.
If that code can use both cores it will even outperform most G4 Macs (Dual >1.5Ghz may be the exception).
If it can be made to run stable with Amiga-code (big if here) it will perform somewhere between SAM440 and 460, aka way byond Efika.