in 
The accent in AF is quite short in this bar, hence it is its shape and context that make us consider it a long accent. The presence of a significantly longer mark in FE (→EE) – such as in analogous b. 17 – points to a possible intervention of a reviser or perhaps Chopin himself. A change performed on Chopin's order would confirm the mark to be a long accent. The mark in GE1 was placed inaccurately, so it is not entirely certain which beat of the bar it concerns.
See b. 17
Compare the passage in the sources »
category imprint: Differences between sources
issues: Long accents, Inaccuracies in FE, Authentic corrections of FE
notation: Articulation, Accents, Hairpins