Stark is considerable more intelligent than Bruce I mean if he wanted to his intelligent plot powers would achieve him a victory a lot faster at pretty much any form of intelligence there is when compared directly. Him mind would be a form of AGI which would learn everything same with reed or doom if you look at it from a realistic perspective. And for doom that doesn't even factor magic into what type of hybrid AGI mind he would have so yeah Stark would out lass batman before the opposite occurred in real time .