There is no accent in AI, since Chopin at some point decided not to finish this manuscript, e.g. in b. 1-15, there are no accents (out of a few ones) or staccato dots (see the description of AI). The short accent in EE is an inaccuracy resulting from the ignorance of the difference in meaning between the Chopinesque short and long accents.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Long accents, EE inaccuracies
notation: Articulation, Accents, Hairpins