It is actually extremely unclear exactly how modern BVR combat between stealth aircraft would play out, so no one can say that for sure. It may well be the case

It is actually extremely unclear exactly how modern BVR combat between stealth aircraft would play out, so no one can say that for sure. It may well be the case that combat between VLO fighters ends up such that superior kinematics matters. It may also be the case that super-long-range engagement against information and control nodes is the key, in which case something like the J-20 may actually be superior, due to being optimized for the longest possible range of A2A combat.