Papelbon ages 24-26: 1.62 ERA, 0.92 WHIP, 10.8 K/9, 2.5 BB/9, 291 ERA+, 0.7 HR/9.
Bard ages 24-26: 2.88 ERA, 1.056 WHIP, 9.7 K/9, 3.5 BB/9, 154 ERA+, 0.7 HR/9.
Not even close. However, the difference in performance doesn't justify the 30 million difference between Papelbon's salary and Bard's (and a couple of relievers') salary during the length of his contract.