here are some armor changes in 9.8, courtesy of fufel_17 (LJ user). The left picture is in 9.7, the right picture in 9.8.
M48A1 Patton - the armor was separated into multiple zones, a new 152mm strip was added.
AMX 50 120 had its commander cupola changed and the top armor zone was changed from 130mm to 100mm. Size did not change much.
Pershing - the 140mm piece of armor was added.
Super Pershing changes - notice the spaced armor thicknesses:
IS-3 - the left part of the mantlet is now 150mm thick and the tracks were added to the hull
T32 had its turret actually buffed
Cromwell - the turret sides were buffed and the mantlet was completely remove (yes, that is a bug)
Sherman Jumbo got nerfed a bit
Type T-34: the cupola was slightly buffed and the thick "weld" armor between UFP and LFP was made smaller
Wolverine armor was nerfed