There is much more going on than just the weight difference between bikes. For an example, the OL's Roadking is only 93 pounds heavier than my Night Train. This amounts to around 12% difference. Hers has a bit more power because mine has the counterbalanced engine and it takes a bit of power to spin the balance shafts. The gearing is the same, but my bike is considerably faster than hers. This is true all through the operating range, so it is not due to the greater wind resistance of the tourbike.
