Pulley tune from SoloMotorSports S5 DSG

The tuner noticed that he usually sees about 10 more HP on 6 speed cars. I wonder if it could be the heavy tires and wheels. 19x9.5 Niche with Comp T/A 265’s.
The low rpm Torque is down because he rolled on the throttle later to stop the downshift the tranny does.
What do you guys think?

http://i689.photobucket.com/albums/vv257/BRD-PREY/LIZOTE%20STOCK%20VS%20STAGE%202_zpswmoxu8rd.png