I just want to start by saying that I do not own these photographs. These were all on ebay with separate auctions, and I noticed they belonged together. Unfortunately, the seller either did not notice or did not care, and they were split apart to different buyers.
I'm no expert, but from what I can get from the pictures is that one is a medic, and the other is in the infantry. The photos range from different times and places, suggesting they experienced a good portion of the war together. That said, I've wondered what relation they held to one-another, if they were friends or blood-related. Either way, I find it rather touching.
I've been planning on posting these photos here for a while, since it won't be too long until the photos are removed and they would never be seen together again. If anyone has any information on who they were/what they did, please feel free to add!