How can you compare the 14 year tenure of Hines Ward to the 9 year tenure of Antonio Brown as equal? If we extrapolate Brown over a similar 14 year career, then he would have 14 long TD's.
I think if we look at receptions of 40+ yards and compare Ward to Brown, we will see what we all know. That Ward wasn't known for the long ball or running away from a lot of defenders, where Brown had the speed and elusiveness to generate plays of 40+ yards more frequently.