Chinese "Red Aegis" is superior to downgraded Japanese and South Korean Aegis
An indigenous Chinese Type 052C "Red Aegis" destroyer is superior to non-indigenous and watered-down Japanese and South Korean Aegis.
Chinese Type 052C/D DDG with AESA radar is superior to Japanese and South Korean DDGs, because America only exports DOWNGRADED weapon systems to other countries.
Japanese and South Korean Aegis (from the U.S.) are inferior copies. The U.S. downgrades the range, resolution, capability, power, etc.
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Here is an example:
Japans Next Fighters: F-35 Wins The F-X Competition
"In the end, US politics denied export permission for downgraded export variants of the F-22, even as its production line was terminated."
That is incorrect, Some weapons systems that the US sells are downgraded and some aren't. Japan for one is using the same Aegis system that the US uses with fleet BMD capability
Japan’s Fleet BMD Upgrades
They are also getting CEC, which is a game changer when it comes to fleet defense
Presumably, the final upgrades will also include Cooperative Engagement Capability.