The sources differ in the range of dynamic hairpins. A's notation is ambiguous ‒ the lower arm is much shorter. Half-bar hairpins of GE are clearly longer than in A, on which the edition was based. It is a typical example of the manner of adjusting marks to the metric units.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources
issues: Scope of dynamic hairpins, Unclear hairpins in A
notation: Articulation, Accents, Hairpins