Jon can move up on his own terms and establish himself as the GOAT. All-time best at 205 and the dominant HW of his era.
DC will be the guy who lost to Jon Jones and then fought once at HW, landing a lucky strike against Stipe to win the belt. An all-time great, perhaps.
In the end, DC needs this fight more because he's old and about to retire. Bones can wait him out and claim the throne because he doesn't fear anyone else on the roster; Stipe might be his hardest fight at HW because he's more like a big LHW and can do more than big man brawl.