ah right! thanks Andy K. in a vacuum this would be true... so we have the heavier dude having an advantage due to his mass, and the lighter guy having an advantage as he is more aerodynamic (right?)... please note I started this post due to my ignorance of the physics involved, not trying to prove a personal assumption

The heavier guy would cause the tires to have a wider contact with the road thus increasing friction and slowing him down (right?)