I think I'd have to agree, not that I would know, but that the more you listen to "River" and "No Land", that it sounds like two guys. I agree with Albert this is a closer comparison than "Sandman", in that these solos have more notes and have various embellishment and response figures, though "Sandman " and "There Ain't No Land" both remind me of that commercial, "Red Bull gives you wings." in that they both soar, where "Ol' Man River" is more mired and slogging it out. All of "Land"s notes and phrases have an overall intricate fully realized purpose where "Ol Man" is more added on pieces, kinda jerkier. "Land" has some of those 'musical surprises' those directions you didn't expect but are so perfect once you hear them towards the end, where "Ol' Man"s phrases are pretty predictable when you hear their openings, and another indication of its lesser creativivity is how he repeats the opening in the second half of his solo. Sounds are different too. I like "Ol' Man River" though; gives me the feeling I got way back in my particular halcyon days of wine and roses that, though I knew almost nothing of Bix, did include Joe Smith in life's soundtrack, for which I'm ever grateful. The other two songs, I didn't even bother to compare. That legato sound he gets in the last part of "Cradle", it's like trying to remember the question when some devastating woman walks in the room. How did he ever do that? It's one thing to make your horn sing but to turn the sound into liquid like that.