A while ago I made a suggestion that an unlockable module could be added to the AMX-30B2 to transform that AMX-30 into the Operation Desert Storm version, but my suggestion was not accepted.
It could be the boxes on either side of the turret front, which can pre-detonate HEAT-rounds. The only other possibility is that the new transmission makes shoot-and-scoot a bit easier with better acceleration, using mobility as a defensive tool.
Or maybe they just confused it with the BRENUS variant when they were writing. Otherwise, I have no idea.