in FE (→EE) instead of 
in A is most probably a result of the engraver's error. In the entire Op. 10 a similar mistake was committed on a number of occasions (in the Etudes in A minor, No. 2, bar 12, E major, No. 3, bar 54, C
minor, No. 4, bars 1, 8, 16, 26, 54, E
minor, No. 6, bars 21 and 32). On the other hand, the origin of 
in GE is unclear, although the presence of this mark in this place is possibly a mistake too.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Inaccuracies in FE, GE revisions
notation: Verbal indications
