Xena:
Capable of eight concurrent real-time threads with shared memory space, at up to 400 MIPS

So Xena has 400 MIPS. AltiVec unit in Pegasos 2 G4 processor has 16 000 MIPS. In contrast to Xena it can be programmed with the same compiler as main CPU core. I prefer to have AltiVec onboard instead of this useless piece of silicon. If it turns out, that the main CPU of X1000 has no AltiVec, well, it would be pathetic.