Well yeah, I supose if features, speed and compatibility are your top criteria, I suppose then Morphos is better.
OS4 is completely run over by MorphOS. A good testemony to the MorphOS developers, and a big congratulations is in place! :-)
MorphOS has more and better features.
MorphOS has better Amiga compatibility.
MorphOS has better performance.
Now, is there a way of comparing overall system stability in general usage?