I did more than 100 hours of searches and cross-searches and found
one old post in which a member heard a Woo2 along a SP in a brief and noisy comparison at a meet

He still preferred the Woo

but he didn't explain why and the conditions were way too improper for a detailed comparison.
Now I believe I figured out the presentation, the 'personal touch' of these amps but I still can't be sure of how they match up it terms of the 'objective performance' like detail, dynamics, transparency, control. For that I need somebody who has compared both.