the way I look at it is even if it's reverse it's still bad.. everything being equal a J-10 against a Mirage III should be 10/0 or 10/1 or at worst 10/2 but no more due to pilot error or luck.. anything more means it's systemic and you need to throw away your training manual.
By "opposite" I mean that PLAAF J-10s and J-7s wiped the floor with PAF mirages and J-7PGs (no kill death ratios given, as far as I can remember).
I wonder, do most nations report the kill death ratios of various international fighter air combat exercises? Red flag for instance?