Unfortunately, I don't think any such people exist now. All those that were able to make objective comparisons have already done so and made their choice.
What's left are people that will stick only with OS4 or MOS on principle.
Or at least that's how it seems these days.
Frankly, I don't think objectivity blinds one from making a choice based on qualitative judgments.
Both OS have a similar price. Both are 32bit, don't support SMP, and run on PPC processors.
But MorphOS is slightly more refined, faster in many operations, and supports lower cost hardware.
AmigaOS supports new hardware, may soon support more advanced graphics cards, and well they're allowed to call it
AmigaOS.
While I admire A-eon's new design, I'll probably stick with Macs and MorphOS.
But in no way does this mean I'm not happy AOS4 is available (or AROS for that matter). It should be much easier to develop titles that work amongst these OS', then it would be to port software from the outside. And, hey, more options, more users. I think the perception that MorphOS users don't value other Amiga descended OS' relates to our posts about specific advantages we believe our OS offers. It's not one upsmanship, or bias, its just based one experience and frequent comparisons.
Again, I really hope AOS remains viable and the hardware vendors for it succeed in finding their market.
Also, I'm really impressed with the progress of AROS.
MorphOS without Genesi is actually looking better than ever.
Its nice to have all these choices.