Possibly, not sure. Haven't looked into that.
He's already got a softer sound here than he had on his earlier Savoy session.
I'm with you, though. I prefer his sound here, and even on the first Roost dates.
At first that sound unlikely, but otoh, has any Bob Shad material been licensed for anything?
The Sittin' In With label is a spree of incongruity, but there are various good sides to be had:
https://www.discogs.com/label/168395-Sittin-In-With?page=1
I am a bit fond of their Peppermint Harris releases myself.