Does the T-80UD have a higher turret ring profile/silhouette compared to other T-80s?

The T-80UD’s turret ring seems like a major weak spot (only 70-80mm effective). I keep dying from shots there. Is the armor modeling in that area accurate, or is it bugged?

The first picture is the T-80UD, the second is the T-80U, and the third is the T-80B.