Marshall has actually played fullback before IIRC, played a match or two there after returning from one of his many shoulder injuries. Played horribly.
Hayne is faster and stronger than Marshall. Both can pass well enough. Hayne would be better than Marshall.
Yeah it is. Marshall was a pretty good defender before his shoulder injuries, pulled a few big hits off which eventually caused it to **** up.
They're about level. One's not better than the other. Marshall's the best club level 5/8th and Hayne's the best FB.