Well the Type 45 is a huge improvement over the Type 42 I don't think it beats the Flight II Arleigh Burke AEGIS Destroyers in some areas. The ASTER 30 isn't quite up to capabilities of the SM-2 and is nowhere near the SM-3. The 45 has 8 fewer VLS cells and no ESSM capablity, no ASROCs or torpedo launchers and has space for only one Lynx compared to the two Seahawks on the Burke.
Of course the RN doesn’t have the huge budget to build the overwhelming ships like we do.
Still a damn fine warship.
I wouldn’t mind having it in my task force.
