well i think my maple 20th neck is close to my Honeyburst maple ASS neck, not fat, just nice and comfortable. maybe the 20th neck is a little thinner than the ASS.
well, it's the same...different from my silo spec, and of course very different from my luke and the JP, but I have to say it's very very closed to the ASS !
My Silo Spec neck is fatter and rounder than my 20th. My 20th has an almost V-shaped contour below the 5th fret. The rest is rounder. Mine are totally different. I don't know about anyone else's experiences, though. Both are great.