& 
The difference in the position of 
between A and FE suggests that this indication did not get into FE on the basis of A (through [FC]), but was added independently to A and to FE or [FC]. It should be noted that each version is an element of an authentic, different concept of performing this theme (already from bar 290), quite consistently differentiated between A and FE.
Compare the passage in the sources »
category imprint: Differences between sources; Corrections & alterations
issues: EE revisions, Corrections in A
notation: Verbal indications