I'd take AC for the seat and IFE.
AC has flat bed seats and AVOD. OZ has some flat bed seats, but not enough yet to guarantee that it will be on whatever route you take. OZ IFE is all over the place, even in premium cabins, some AVOD, some not. OZ cabins also tend to be stifling hot. Food and wine probably slightly better on OZ. OZ service will be more Asian style if that is important to you.