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Rhythm

b. 1

composition: Op. 25 No 8, Etude in D♭ major

in A (→GE)

in FE & EE

..

The use of the  time signature is surprising only in EE, as in FE the  time signature was not used in the Etudes even once – contrary to the manuscripts – neither in Op. 25 nor in Op. 10, in the Etude in F minor, Dbop. 36 No. 1 (cf. the Impromptu in A major, Op. 29). Anyways, the correctness and authenticity of the  time signature written by Chopin in A (→GE) is beyond any doubt.

category imprint: Differences between sources

issues: Changes of metre , Inaccuracies in FE , 4/4 or 2/2

b. 26-27

composition: Op. 25 No 8, Etude in D♭ major

g2-e3 repeated in A (→GE) & EE1

g2-e3 repeated in FE & EE2 (→EE3)

..

The ties sustaining g2-e3 are most probably a Chopin improvement introduced at the time of proofreading FE.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE , Main-line changes