I forget (if I ever knew) the details of the stereo verses mono versions of the Ellington/ Strayhorn "Such Sweet Thunder". I remember that the stereo version of "Up and Down.." doesn't have Clark Terry quoting "Oh what fools these mortals be.." at the end, but are all (or any) of the other tracks also different?
BTW The mono version of “Up and Down” can be found on the cd entitled “Ralph Ellison, a Life in Music” as well as the box set “The Complete Columbia Studio Albums Collection 1951-1958” which has the mono version of SST as well as a couple of stereo masters of other songs and other recordings from the period.