By modern standards, AmigaOS (4, using the past feature list PDFs as reference) is not 'feature-rich'. For example, lack (none? samba?) of network file sharing services on a default install. I don't know about MorphOS but I would guess that it is lacking in similar respects also. If someone can point me in the direction of a decent feature guide to MorphOS (not a sales document pls), I'd be interested in reading it, as I imagine would the original poster of this thread.
The AmigaOS4 feature list should still be available at os.amiga.com.
As far as AmigaOS4 is concerned, AmigaOS is lacking software-support wise in some respects. For example, lack of a decent, up-to-date web browser, and office app type software is a bit thin on the ground (someone reel off a few names?).