the X1000 software is still unoptimised.
This claim keeps resurfacing, but I haven't seen any valid data to back this up. I have a feeling this is the same old claim that has always been thrown around when MorphOS has beaten AmigaOS4. If you follow this line of reasoning AmigaOS4 is still unoptimized, not only X1000 but classics, AmigaONE GE/XE/Micro, Sam440 and Sam460, too.
I'd suggest that a more accurate representation *as the software stands at the minute* would be
1. Code running on a single core on the PowerMacs is probably slightly quicker a single core of the X1000.
Depends on the speed of the PowerMac CPU of course.
2. The memory access speeds on the X1000 are much faster than on the PowerMac.
This is true.
3. The graphics card capabilities of the x1000 are much ahead of the Mac Mini.
This makes little practical difference as there are no 3D drivers for the new cards. MorphOS is massively ahead in 3D.
4. All these are subject to change as OS4 and MorphOS code gets more optimised for these systems.
I don't see much performance improvements coming from code optimizations at this point, at least for MorphOS. MorphOS has been fairly optimal for years.
Now, it might be that OS4 is still lagging behind in numerous ways but considering it has been way over 10 years now I can't see how it would change anytime soon.