Who should i start in fantasey football in the tight end position kellen winslow or heath miller?

i have kellen winslow starting and heath miller on ym bench, kellen recieved more yards but scored two less touchdowns then heath. My concern is if i start heath i dont no how pitt will use him. I dont no if he is gonna get more pes his way or if he will be used mainly to block big ben. Any one have any suggestions?