So no one thinks I'm specifically bad-mouthing VPI or any of the other premium cleaners, that wasn't my intent. Indeed I have no experience with them. Also, as a trained scientist (as well as other things), I don't view Alan's post as scientific, and I'm sure he didn't intend it that way. My comment was directed at the idea that in order to get one such machine to work it MIGHT take two passes to clean a record on it. But of course, on a re-read, that wasn't what Wanderer said.
As for a shootout, I'd bet that 10 or 20 seemingly similarly dirty LPs cleaned by both machines would give a pretty good, albeit non-scientific, picture of how they work. My guess is that they will both do a good job, and perhaps that's enough for many of us. But the Spin Clean can only clean the entire record (both sides) at a go, so a side 1 vs side 2 shootout won't work.
Cheers,
Carl