The Classic PPC version is still at 1.4.5, not sure if/when it will be updated.
From what I have read, the relative speed of 1.4.5 is Classic < Efika < Pegasos.
For classic, not sure what their hardware was in addition to CSPPC, but I would have thought the 233MHz 604 could be comparable to XXXMHz 603e in the Efika? Or not? Maybe they had an old slow hard drive or a slower gfx card, it all depends.