I'v listened to the speakers you reviewed, although not in an A/B setting, and agree with what you have said concerning m22/m60 and qs4/qs8. I also would say most of what you say concerning qs4/qs8 could also be said concerning vp100/vp150.
the vp150 seems to have more authority than the vp100 it replaced. the dialog seems clearer.
I A/B'd the VP100 and VP150 and the differences are less than you make them out to be when directly compared, at least IMO.
They play at nearly the same SPL and sound nearly identical, with the edge going to the VP150 for a slightly lower FR range. I found the VP100 more desirable for smaller rooms as it played cleaner/clearer at lower volumes, while the VP150 sounded better at higher volumes needed for larger rooms. At this higher volume the 150 started to sound more like the 100.
This is a similar finding to my M60/M80 comparison, in that the M60, when played louder, sounded more like the M80, but the M80 just sounded the same at all volume levels. The M60s opened up and became more airy and detailed while the M80s sound that way all the time.
