Maybe the priority list is not for a desktop machine, but more in line with the Rack mounted Omega: [link] A Omega has a high instructions / Watt ratio and a XScale Omega will have a higher. When you scale the benchmarks to the minimum size of their PSU then Iyonix (200 W) and Omega (140 W) are very close.
Maybe MicroDigital is going to explore another market? Top of the embedded market, Telcos? But then I would expect a Unix-version for the Omega because Riscos has some disadvantages for those markets.