Other products get upgraded individually, so firmware updates probably won't be consistent for all the models at the same time. A variance between models is completely normal.
But yes, v.1011.4 is the latest version for the HT-C6930 for the U.S.
I got this system and I am wondering if 1011.4 is the latest firmware? I see other products are already 1019.xx is this system up to date with all the improvements?