Knocking over steel depends on momentum delivered by the bullet. Momentum is the product of velocity and mass.

Take the 140 gr AMAX in the Creedmoor with a MV of 2710 fps and project it out to 1,000 yards.

Do the same for the 168 gr AMAX in the .308 and project it out to 1,000 yards.

The momentum is slightly greater for the Creedmoor at that range.

The wind drift for the Creedmoor is almost 30 inches less than the .308 Win.

The drop for the Creedmoor is about 25 inches less than the .308 Win.

Bottom line, the Creedmoor has less recoil, greater knock down power, and requires less correction for wind and elevation.