The Polyfacial Identities of Mr. Hyde

While transcribing the burning up-tempo blues head "Mr. Jekyll" from "Milestones" (1958) today, it came to my attention that, (a) "Mr. Jekyll" was a misspelling of Jackie McLean's blues head "Mr. Jackle," and (b) that Jackie Mac and Miles had recorded "Mr. Jackle" three years prior to "Milestones" on a record ambiguously named "Miles Davis and Milt Jackson: Quintet/Sextet."1

 The version on "Milestones" is the one I (and probably most people) am familiar with:
The version on "Quintet/Sextet" is a bit more harmonically and melodically adventurous, not to mention significantly slower (although not any less swinging!):

The tri-tone sub in bar (1) was shocking the first time I heard it (after having been accustomed to the 'simplified' quick version), and the horns trading off segments of the melody in bars (9) and (10) is nice, although the language seems a bit quaint, if that's the right word, compared to the rest of the tune; I guess it makes sense that bars 1-4 might be more of Mr. Hyde2 with regards to its harmonic and rhythmic energy, whereas bars 9-12 are much more button-downed, melodically speaking. 

The ending's also nice — a mini-canon, if you can even call it that.

I'm usually a bit reluctant to call records just "Quartet" or "Quintet" if its unclear whether those are descriptors of the band leader(s) or the name of the record itself. "Metheny/Mehldau: Quartet" comes to mind as another example of this strange ambiguous album title phenomenon—how much effort does it take to come up with a record title, or, more specifically, how much effort does it take to come up with a record title better than the descriptor to the band leaders? I guess the music makes up for it; it's all about the music, right?

 Somewhat tangentially, the whole Mr. Hyde v. Dr. Jekyll dynamic can also be seen elsewhere in jazz, i.e., Josh Redman actually describes himself as having a sort of split personality that enabled him to succeed in both the rigorously academic and the more freely creative spheres.