The length of an accent used here remains an unsettled issue - short in EE and GC or long in FE (also in subsequent bars - compare bars 418-431). For GE we adopt a short accent just like GC, and the fact that the accent is placed under the RH part must have been the engraver's arbitrary decision.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Long accents, Placement of markings, GE revisions
notation: Articulation, Accents, Hairpins