so if the JFT is providing comparable capability = or more than F-16 Blk -15 - 30 - 40, then why persue the FC-20 whose performance is considered 'similar' by western analysts?
Not entirely accurate assessments.
They base their performance estimates on what is known about the J-10A.
The FC-20 is not a concrete concept or frozen design as a first..
It started out being a Pakistani J-10A.. then moved on to a customized J-10B..
The J-10 airframe offers longer dry range, heavier payload carrying capacity and greater space and power for advanced avionics such as AESA.
The JF-17 cannot match it for space and power.