Although it's an enhanced version, there are differences compared to the Premium Bandai version. The biggest difference is probably shown in the photos other than the one shown. Also, the plated parts are gone, so it might look better if you paint the parts that were previously plated. In addition to what's shown in the photos, the rear armor has been changed to one that can connect to the Hyper Mega Cannon's energy pipes.

Full Armor ZZ (Enhanced Type) - Different Base Body Parts | kazsenna's Gunpla works