I haven't heard the Definitive. I got a really good preorder price on the Columbia and replaced my King Jazz cds etc. with it. I'm a Billie nut and I had to have it. . . and I'm glad I do have it. I think the sound is very very very good. I'm not equipted to do 78s, so this works for me. A really fine job in my opinion.
If the Definitive sounds really good, hold fast. Brooks' notes etc. are nice, but liner notes and blah blah blah from the annoited cognoscenti mean less and less to me these days. If they mean more and more to you, they're there on the Columbia.