The two waterproofing panels stowed on the glacis plate are molded in place and look terrible, as do the molded-on storage lockers on the side panniers. They need to be remade from styrene stock.
Eduard has a photoetch set that will greatly improve the basic kit, particularly the engine deck grills. The central circular grill comes with the early transverse grill slats.
The Azimut kit has resin and brass parts to update the tank to 1991 AMX-30B2 configuration, including the later, bullseye pattern circular grill (though you still have to make those parts I mentioned above--they are not included in the Azimut kit--and many of the Eduard parts are still needed). My Azimut kit had a poorly molded turret stowage box--the mold had been squeezed too tightly, and the top and bottom of the resin part were bowed inward. Gotta break out the Milliputt...