Nonsense - look, you cannot just look at the CPU alone to quantify "power".
Of course you can, if your applications needs power, you will only get that from the CPU alone. For example, any G3 CPU will be better than the Sam/Efika class "G2" CPU's with no L2 cache, especially when running older, 68k emulated Amiga applications.
To me the efika is and always was useless
Well, the Efika isn't for anyone, *it is* rather limited in its specifications. But OTOH this is also its strength, the low price is perhaps its most prominent specification. And it was only supposed to be an evaluation/development platform for the next step in the plan, the 5121b based LimePC/"Cherrypal" devices (that unfortunately never happened).
But what do we see if we look at the Sam? We see a motherboard that costs about as much as a PowerStation (another relatively low volume machine, one can suppose), with *four* G5 cores, 4MB L2 cache, 4 Altivec units, 8 FPU units, etc, etc. This is powerful hardware. The Sam costs about as much, but is outperformed by *PDA's*! I'm sorry, but this is as useless than an old Trabant sold at the price tag of a Ferrari; only the few die hard Trabant brand followers will even consider it, effectively making this a *none option* as a future platform. It's not an option. It's utterly useless from a future-building perspective.