I haven't met a vintage Ibanez neck I haven't liked, although, they do vary. I can't remember specifics as I've played so many vintage Ibby's. My latest fav is my JP20 (Joe Pass hollowbody). Neck is so wonderful and it's a very easy playing guitar.
The AM205 is a little 'darker' sounding than the AM50 which is brighter. True jazz players prefer that darker sound. I really liked that the bridge pickup sounded great - not too brittle , bright or harsh sounding. Very usable by itself.