The Sports Tourer and Super Sport shared the same front derailleur (which varied depending on the year), but the rear was always different. From 1970 through '74 the Super Sport used a GT-200 or GT-210, which were long-cage variants on the "Schwinn Approved" Huret-built rear derailleur, but there were subtle changes such that there were at least 4 variations of these depending on the year. There were two minor variations of the GT-200 used from 1970 through mid-'73, then two minor variations of the GT-210 used from mid-'73 through '74.
The Sports Tourer used a Campagnolo Gran Turismo rear derailleur in '71 and '72, then changed to a Schwinn Approved GT-300 (rebadged Shimano Crane GS) for '73 through '75. Of those the GT-300 was far superior and many '71-'72 owners upgraded once it came out.