Late reply... I have some of the Intégrale (Vols 1-3), the Sony Hot Fives & Sevens, and the RCA 4CD set - so I'm in a similar situation... should I go on with the Intégrale despite all the duplification, should I get the Mosaic... what about the darn 12 or 13 Chrono Classics for which I spent way too much and that will (at least half of them) be superfluous when I get the Mosaic (and the rest, I guess, when I go on with the Intégrale... which would triple the stuff in the Mosaic...)
I guess I'll just keep buying and live with duplicates - similar with Ellington. There's just no way to have most of it and have it all only once, it seems! Though with Satchmo, if you had nothing at all yet, the Intégrale would do that job, I guess!