Calm down guys. This was an image pulled from a library containing 3-4 M4/75 images, by someone who normally doesn't show a lot of in the details of the graphics. Don't believe me? Check out the
NZ service troops in Parachutes Over Crete as an example.
In days of auld lang syne, other units have had their values changed. I asked Dr. Mike about this when I noticed the difference in the Sov 76.2mm field guns of 2 games. He said to use the units from a given game, for that game. Thus far there has only one unit (there were 2 which were replaced) errata'd to a new version. So if there are AV-4 Shermans in Ardennes '44, I think they will exist in their own space.
AV-4 Shermans already exist in the library. So if they are in Ardennes '44, it isn't a big deal, but there may need to be a little relabeling.