SANTA CLARA, Calif. – It's become obvious that the San Francisco 49ers are a different offense and Colin Kaepernick a different quarterback without star tight end Vernon Davis.Davis missed the Week 3 game against the Colts and the second half this past weekend against the Panthers. The 49ers lost both games. There is no doubt the 49ers need him back if they are to have a chance to win Sunday at New Orleans.Davis left the Carolina game with a concussion.