Why there are both KJ-200 and KJ-500 ? They seems to be redundant, despite differences in approach they essentially fill the same role of AEW.
KJ-2000 could be viewed as "high end" system while KJ-500 seems to provide "lower cost" system for AEW solution, but i wonder what to make of KJ-200. Is it an "even lower cost" solution or something else.
It was introduced a bit earlier and therefore offered an interesting complement to the KJ-2000 … IMO they are today under conversion to the KJ-200B but no longer as pure a AEW but an ISR asset