Luke, I have done comparisons, as has some Axiom employees. Due to physics and cabinet size it is not possible for them to be identicle in performance, especially in the lower frequencies.
I'm just going by their blurb...
"The W22 on-wall/in-wall hybrid speaker preserves the sonic clarity of its bookshelf equivalent, the M22, and adds a slim profile that is a perfect complement to today's modern low-profile plasma and LCD TV screens."
Says to me that they should sound "equivalant" ... I would have expected that the cabinet volume was the same, but hey, I guess not.
Back on topic- If the wall is 15deg from vertical then the mount should work okay, just make sure the speaker is locked into the frame properly.
