I'd say things are now reaching the question the Americans have been been pondering for a decade - Is the F-22 really sufficiently superior to the F-35 to form a proper Hi/Lo mix in both its procurement and combat doctrine? The F-22 is an old plane, and unlike the J-20 it didn't get a significant MLU (J-20 -> J-20A) to keep it apace with the next fighter in the same generation that benefits from at least 10 years of technological progression (both F-35 and J-35). The legendary status of the F-22 from which it derives its superiority over the F-35 in popular perception is the same kind of illogical belief that the J-20 is intrinsically superior to the J-35 by virtue of being the first and an air-superiority design even when they are a decade apart in technology. And I say this as someone who is very biased towards the J-20.
For the US, the decision was easy because its wasn't even a decision. F-22 procurement ended very early, and before the F-35 debuted, which means it didn't need/couldn't to be considered in terms of Hi/Lo procurement. And in terms of combat doctrine, the US military generally only refers to the F-35 in its future plans, which does suggest how they view even the F-22 units they have in existence.
But since the J-20 is still being produced and production is at max/ramping up while J-35 production is starting, clearly the J-20 is not any worse (in the PLA's perception) than the J-35 even if its stealth is inferior. There must be qualities that still justifies the J-20's higher price yet worse stealth (other than simply filling up numbers when there is sufficient funds and existing J-20 production lines). Although I doubt we'll ever get an official source on why the PLA thinks the J-20 is better (or at least equal) to the J-35. Perhaps they just know that stealth isn't the be-all-end-all, even for 5th-gens, and that the J-20s greater range and (possibly?) maneuverability and speed makes is superior overall. I think we should speculate on this platforms comparison, as it may impact procurement numbers of J-20/A vs J-35/A in the coming decades.
Primary question: Is the J-20/A superior to the J-35/A?
Secondary question: If so, or if not: Why?