There are plenty of reasons that Billy Turner could, and should, end up winning his battle for a starting spot at right guard.
One of the first of those reasons could be because he's not Dallas Thomas.
Both Turner and Thomas played tackle in college, with Thomas entering the NFL in 2013 and Turner entering the league in 2014. Both men took a redshirt year as rookies, with Thomas playing two snaps in the 2013 regular season and Turner playing 17 snaps in his first season in the league.
The Miami Dolphins appear to have at least some level of confidence that Turner can be an upgrade over last year, when Daryn Colledge was the primary left guard.