Does anybody know how does it boot to NT system?? A black magic happens between MBR and user shell being loaded. Amiga has startup-sequence. Even mac 9&10 is better that way.
Click-to-front: damn, how i hate it!. I prefer doubleclick-to-front with MCP or other tool in AmigaOS.
Virtual Mem/paging - having 128Megs of Fast in my a1200 for more than 2 years, i never ran out of it. In pc i have 768 and always run out of it. Mac - i have 384MB. In OS9 i disabled VM, in OS X it`s enough to run OK and damn stable.
Stability - No comments about Windows. It simply crashes without reason from time to time, no matter of what hardware it is running on, and how is it configured.
A correctly configured AmigaOS is stable as hell.
Even my patched Mac OS 10.3.9 running on unsupported Mac model is stable. (now it runs primarily as Internet access gate almost 24h/day for more than 2 months, and when i have to shutdown other machine for a while (normally 3-4 times a day), i always run iTunes and some muzaxx on it

AFAIR, for those two months I NEVER HAD A CRASH on mac!!!)
Desktop conventions - Windows suxx. No stable conventions. AmigaOS - gives you choice. Conventions clear and simple. Mac OS X - has some preconfiguration, but does not really make difference if you fell free to break them.
Applications installation/uninstallation - Windows pain - always leaves tons of sh*t in many folders. AmigaOS - Just delete related files and remove assigns (if any), and sometimes libraries, but I used to not delete libs - as they almost always may be handy with other apps. Mac OS X rules here. Not only it rarely stores application-related files in system folders, it also (by default) shows the whole application folder as (this) application itself only! You simply put that in trash - and it`s uninstalled !!
Screen flipping/dragging - virtual desktops have nothing to say. AmigaOS is excellent with these capabilities. Not only (with native graphics) it switches the screens ABSOLUTELY IMMEDIATELY, but also it allows you to see as many screens as you like, when you drag all of them down a bit.
If only i had AmigaONE...
Or even if I had a faster (at least a 500MHz) Mac..
I would never want to look at the Windoze again then.