I think people are weighing not just the raw performance of the radar. And they are correct in doing so. Below the Belgian RFP and the weighting they will put on the raw performance of the fighter is “only” 21%. I remember something very similar in the Swiss report pitching the Gripen, Tiffy and Raffy against each other and benchmarked against the Hornet.
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Chinese capabilities (product technology, production processes, product quality and customer services) are improving and closing the gap against the West. Something acknowledge even by the West. Specifying and buying a system to make operational in the next 5-10 years and to operate for the next at least 30 years, it is expected that by 2022-2027, the KLJ-7 series and the Vixen will not be far apart. In fact, from they maybe not be far apart already.