One of the main features of the 1944 Johnson was the new sight it used either the canted forward single aperture as its battle sight or the adjustable ladder sight. I don’t know which 1944 DF used for reference but no photo or image of a 1944 had the original sights
While the 1941 might be a more to your liking the 1944 sight might make the gun feel more unique and help it accieve an own identity outside of just beeing a copy paste clone of an already existing gun.