And what do you think about EFIKA?

A "pocketcalculator" would be enough for many.. it is a computer hobby. And my calculator isn't that powerfull....

Efika for MOS and Samantha for OS4. It depends on which OS you want to run.

If i want MOS i don't care if Samantha cost less and it is more powerfull and viceversa imho.

Samantha specs are impressive imho, the pcb is completely full of goodies