Doyle was at -22 rField for his career, Evers was at +127. That's a pretty large difference, based on their defense alone Evers would be expected to win about 15 more games for his teams, over the course of his career, than Doyle.
Having good hands is (except for those who are extremely bad) relatively unimportant for defense. Being able to get to balls is much more important.
rField for these guys is based on their Total Zone Rating. Basic info about Total Zone can be found
here.
Converting Total Zone Rating into runs is probably done through a linear weight system. Details on linear weights can be found
here.