By Shawn Childs Dallas and Philadelphia are the early betting favorites, so let’s determine what separates the two NFC East teams. Based on the summer over/under win totals at SI Sportsbook, the Dallas Cowboys are the favorites to win their division (+110). The Eagles project to finish with a .500 record, but they continued to inch closer to Dallas in their division odds (+175). New York and Washington have the same over/under (7.5), but the Commanders have the edge to finish in third place. The Cowboys come off a productive season in scoring while relying on two impact players (LB Micah Parso…