From My book of luftwaffe claims they are indeed the most likely claimants. The book gives the following
4/NJG4, Uffz Rolf Koch, Four-eng, Near Yvetot, 23:47, 1st kill
11/NJG4, Hptm Hubert Rauh, Four-eng, Le Havre-Lisieux, 23:50, 22nd kill
Hopefully this helps, haven't looked at a French map but this should distinguish the two claims, providing Yvetot and Lisieu ren't slap next to each other
Kev Stevens