The point where the 
mark begins in A is difficult to define, as its upper arm is clearly longer than the lower one. In GE, the upper arm reaching the beginning of the 2nd half of the bar was considered decisive; this is consistent with the general sign interpretation tendency in that edition. Hairpins of that length were also reproduced, with slight inaccuracies, in FE and EE. However, in the editors' opinion, the starting points of both marks in that bar were supposed to highlight the highest notes of the melody (cf. the previous remark).
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources
issues: Unclear hairpins in A
notation: Articulation, Accents, Hairpins