As most of you probably know, in patch 9.10, a batch of around 20 tanks are being reworked into HD. Among these is the tier 6 French heavy tank, the ARL 44 (as you can see here). The top turret was changed slightly, but it doesn't look to be a huge difference. However, something else was changed: the stock turret. You see, the stock turret was from a completely different heavy tank design: the FCM F1 Superheavy tank, as you can see in this picture:
Happy tanking!