We just don't have anything to go on yet this offseason cause we have not seen any sign of a completed deal between the Sox and anybody yet. But trying to read between the lines, now it seems like whatever the difference is, it is greater than 2/$20 vs 2/$25 or as has been posted here, both positions have solidified to concrete with David figuring it is worth it to him to see if somebody will bridge that $5M gap for him in FA.
That might not work to his benefit though because of the Achilles. Nobody outside of the Sox is going to know anywhere near as much about that Achilles as David and the Sox know and while David would have to pass a physical after signing with somebody, I am not sure there is a team out there that will both bridge the gap for Ortiz and then take the risk.