Brad, as far as I can tell, AMG is simply WRONG (once again) regarding the Candido. That is a very good session!
There are lots of vocals on the Bartz. It is an lp I like, but if you don't like the Mizelli Brothers production on the Donald Byrd sessions, you won't dig this one. (It IS different than the Byrd's to my ears, BUT it has a lot of vocals.) It's quite funky; fits in that way with the Rare Groove idea.