i don't think you can even compare a career backup to a career starter, even though that starter has a bad win percentage.
but in terms of career earnings:
blaine = 9 seasons, $21MM
https://www.spotrac.com/nfl/tennessee-titans/blaine-gabbert-7725/cash-earnings/
chase = 11 seasons, $34MM
https://www.spotrac.com/nfl/chicago-bears/chase-daniel-7081/cash-earnings/
blaine may have the better "football" career but chase is making out like a bandit. dude is my hero.