That makes sense of having a higher tier and a medium tier. Iirc previously it was posted here somewhere that PLAAF (PLANAF too?) considers low tier CCAs as not useful/capable against a peer and a waste of resources.I suppose there should be 4 different, unknown CCA-type UCAV models (bracketed in blue), not just 3.
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The larger two could be high-tier ones, whereas the smaller two could either be mid-tier ones or in roughly the same tier as the larger two. In addition, each of them could have been adapted/designed for different usage situations.