Re: The mysterious J-19
The J-16, if turns out to be what Huitong said, would be the equivalent to the F-15K, not the F-15E. Like the F-15K, the J-16 possesses very high payload and strike capabilities while retaining its ability to engage in air-to-air battles.
The differences between the F-15E and F-15K, while not superficial, are not that significant. I think there are additional EW suites and an IRST, better engines and ability to fire weapons like SLAM and JASSM.
And the F-15E possesses a "very high payload and strike capabilities while retaining its ability to engage in air to air battles" too... The F-15K to the F-15E is basically what the F-15J was to the USAF F-15C.
The J-15 is currently the equivalent to the F/A-18F Super Hornet and Rafale-M, with the AESA radar, decreased RCS, and maneuverability giving it advantages over the Super Hornet. The J-19 will be equivalent to Russia's T-50K or the F-35.
We dont' know J-15 or J-11B have AESA. It's probably in the pipeline somewhere but nowhere near as established as the F-18E/F's APG-79 and it's too distant to say with confidence "oh yeah J-11B has AESA", because they don't. J-15 is basically a modern build, Chinese Su-33 with current J-11B level avionics, which themselves are not that world class, just to have a competent fighter aircraft to send off a carrier. We can't really go into a very detailed comparison because we have no idea what the avionics of the J-15 are like, but there are some things you can take for granted, like it won't be entering service with an AESA.
J-19, if it is real, will be what the F-15SE is to the F-15, at best. You really expect far too much from SAC.
(And also, you said J-19 would be comparable to T-50K and F-35... Are you saying T-50 and F-35 are therefore comparable?)
J-15 is based on the J-11B, which means that its RCS is 8 times less that of the average Flanker (and the F-15) as well. The J-15's AESA radar (assuming it's the same one used on the J-20 or J-10B) will probably give it an edge over the Super Hornet.
Well the J-10B and the J-20 obviously won't use the same radar and I doubt the J-15 will either, simply due to the massive physical differences in radome size between the first two, and also you can't simply put one radar for one plane onto another.
That whole RCS 8 times smaller thing is also dubious and it quoting that doesn't say anything apart from "ha we have some RCS reduction"... And the J-15/J-11B does not have the F-18E/F's level of RCS reduction (from what we can tell in terms of looking at it), which itself isn't that great in the first place.
Overall I feel Huitong's assessment of the J-15 is most accurate, that it's comparable to the F-18C/D (but not in terms of physical size/range/payload, of course).
J-20 fighters aren't receiving the top priority right now. There has been rumors that SAC is building a rival to the J-20.
... J-20 isn't receiving the top priority? Can you really say that with such confidence?
SAC were knocked out as the main contractor... their proposal was flat out rejected. If they are working on a "rival" it would most likely be private funded.