Adding on to the discussion regarding Chinese ABM/SAM capability versus the Japanese/American AEGIS destroyers:
We have to remember that AEGIS refers to the whole integrated system of anti-air and anti-ballistic missile capabilities. So an analyst must pay attention to these key areas:
- Hull or platform
- Radar
- Missiles
- Datalink
The Type 052D and Type 055 are exceptional designs with excellent hardware. The VLS is standardized and also very large, which means they can fit very large missiles, or multipack several missiles without issue. The radars are also very impressive pieces of equipment, with both the 052D and Type 055 featuring large and sophisticated dual-band AESAs for air search and tracking. In the case of the Type 055, it even has AESA for horizon search and targeting.
AEGIS ships are ultimately limited by their hulls. They cannot fit larger missiles because the Mk 41 VLS is only so large. They cannot fit larger radars because the hull is only so large. To improve an existing AEGIS ship, one would have to redesign the hull from the ground up, with new powerplants and a deeper draft, for a new and larger VLS, and a larger deckhouse to accomodate more powerful radars. On the other hand, Type 052D and 055 has already solved these issues by making the deckhouse and the VLS massive.
Unfortunately, where Chinese destroyers fall short is in terms of missiles, and combat data integration. There is no equivalent of the SM-3 missile for ABM, or the SM-6 long-range SAM for the Chinese UVLS on the 052D and 055. There is also no short to medium-range multi-pack SAM, like the quad-packable ESSM. The Chinese Navy has the HHQ-9 for long-range anti-air, but it is over 20 years old now, and the Chinese Navy will undoubtedly be looking for a newer, more advanced missile for its new surface combatants.
For data, not much is known about Chinese military data links, and while they undoubtedly have something under development (and some equipment fitted to warships), we are not sure about its capabilities.
So while the Type 052D and 055 have much greater potential than existing AEGIS platforms, they don't have the missiles and other supporting equipment to reach maximum potential. If the Chinese Navy can produce an ABM to launch from the CUVLS, then the Type 052D and 055 would undisputably be the best surface combatants in the world.