The projection systems expect Cozart to have between a 82 - 91 wRC+ while playing solid defense in 2021 despite his last two seasons being injury riddled and otherwise abysmal.
The projections systems expect Garcia to have between a 42 - 51 RC+ and above average defense.
I do not agree with your (or Ron's) assertion that he is a "washed up vet" since it was less than three years ago that he put up a 5 fWAR season and is only 34 years old. I will not let his poor 96 games in Anaheim allow me to know for sure that he is nothing in the tank and I certainly think Cozart has a better chance of being useful in the bigs in 2020 than a guy who hasn't played above A ball.