Jeter vs. Reyes: Who's more valuable?

The Matchup:
Yankees SS Derek Jeter and Mets SS Jose Reyes

The Debate:
Jeter and Reyes, New York's two All-Star shortstops, have had stellar seasons, good enough to merit MVP consideration in their respective leagues. They've been catalysts in the lineup, on the field and on the base paths, leading the Yankees and the Mets respectively into the playoffs with the best records in their leagues.

But which one is more valuable to his team? ESPN.com writers Jayson Stark and Jerry Crasnick make a case for the shortstops below.