There's not much difference to me. It's nice to see new hw products and we can only hope they sell well, but at that scale, business is always quite risky.
However, pegasos and efika designers were known from their previous amiga products, which could give more trust regarding hw reliability (even though we still had this sad articia story, which was handled correctly by bplan/genesi, unlike eyetech). Acube seems to be new company, I haven't seen any previous similar product from them, so we can just legitimately wonder if the hardware is reliable (I'm not saying it isn't).
And finally, Pegasos 2 was quite well spec'ed (when it was designed) compared to existing Macs models from 2003, and also quite cheap. Something which can't be said about current SAM model.
