in 
According to us, the virtuoso panache and brilliance require rather accents than diminuendos, hence in the main text we interpret all marks of A as accents (long and short). The 
marks printed in GE (→FE→EE), even longer than in the notation of A, hinder the interpretation of a possible intention of the composer even more. Shift of the accent at the end of bar 485 must be an inaccuracy of the engravers of GE1 and FE1.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources
issues: Long accents, Inaccuracies in GE, Inaccuracies in FE, Errors in GE, EE inaccuracies
notation: Articulation, Accents, Hairpins