Did you watch Brady vs Craig? The way he won was by maintaining top position and making sure he wasn't in danger, which I assume will be his gameplan here, not by outgrappling Craig or threatening him with anything worth noting. Leglocks were also banned for that fight which also played a big factor.
The Barbosa loss was also in 2021, same year he beat Lovato Jr and was still enough of a threat on the mat for Khamzat to get the hell away from there. Furthermore Brady couldn't sub Chiesa, a willing grappler who has been tapped 5 times in the UFC. Barbosa also has like 250 BJJ matches on record and over 70 sub wins.
Imo Gilbert has the finishing upside here, but if you were to play Sean getting the nod without the judges involved then KO would be the way I'd go. We know Gilbert doesn't have the best chin, age just makes that worse and there is still a chance that Brady doesn't try to grapple out of fear of either gassing out, or just respecting Burns' ground game.