Totally unlike that other amiga-derivative OS.
...which indeed shares the "tied to the PPC anchor" faith of OS4, but at least aims to be running on all relevant PPC mainstream HW. Because if there is such a thing as mainstream PPC HW, then it consists of machines like the e-mac, mac mini, power mac and power book...
Ben Hermans and the Frieden brothers on the other hand doesn't think mainstream PPC HW is a small enough market, so they need to narrow the options down even further to systems built in batches of 30 units, costing a magnitude more, while offering less.
That shows the difference in philosophies between the two - MorphOS aims for being runnable on as many platforms as possible, and if there would have been an easy way of making it x86 to run on generic Intel HW they would probably have done it some time ago already, while OS4 wouldn't, because then "it would get pirated" (or such strange arguments)...