Fantasy DBs – King or Smith

Finished up a fantasy draft and am filling some holes – decided I'd come to the place of Texan's knowledge to help me out with a DB selection. Our league is pretty deep so I'm digging for another DB and both Desmond King and Tremon Smith are available. It looks like one returns punts and the other returns kicks, but maybe King is on the field more for defense? But also Smith just had an interception and is trying at RB? Which one is likely to see the most play time and have the most appealing stats for fantasy? It looks like Tremon might hardly see the field on defense, but that's why I'm asking!