The franchise replaced their head coach and offensive coordinator at the end of the 2012 season, having finished last in the AFC East for the fifth consecutive year.
The running back told Buffalo News: "There's a huge difference. You don't want to take anything away from that coaching staff last year, but these coaches want us to be excited.
"You sometimes get coaches who don't want that. They want you to act like you've been there before. This coaching staff is about loving to play this game and want our guys to have fun. We only get to play this game for so long in our lives. You should enjoy it."
Former Syracuse University coach Doug Marrone was named as the Bills' new head coach earlier this year.