Leonard conducting the New York Philharmonic on March 26 this year (photo, Chris Lee)
The original Schumann Four is lighter in texture than the 1851 revision, has no repeats marked in the outer movements, and tempo indications are in Italian rather than the German they would become.
Following the performance, announcer Richard Freed informs that, at the start, comparisons had been made between the two versions, with examples; unfortunately not preserved here.
For more* from the Marchant Tape Archive… https://www.youtube.com/@MarchantTapeArchive
*including Milstein, Mitropoulos and Szell…
Thanks for posting! Did you notice that Slatkin himself commented on the video? Pretty cool.