With less than 10 years of service in PLAAF/PLANAF, Su-30MKK/MK2 still have a long career before any replacement is needed. J11BS has got the potential for a F-15E type deep-strike role so it's armament configuration might be different from J11B, and that's about it. J11BS(H) used by PLANAF would naturally focus on anti-ship missions just like Su-30MK2, overally apart from weights & dimensions, all these variants are different but in terms of electronics and armaments they carry for specific missions assigned to them.
I'm almost sure at this stage SAC has got some further modified version of J11 on drawing boards, now that all 4 siblings of the second generation J11 clan have come out. And that's the tragedy of it...