As per HIT spokesman, "There has been changes in composite armour structure with an added layers, thicker side skirts, improved transmission, FCS made by HIT in association with Krauss Maffei", Thetis TI etc.Al Zarrar use a simple spaced armor on turret, effective against HESH and simpler, less capable shaped charges or EFP's, but that's all.
also spoke about some new ammunitions but that was it.