Looking at two different bikes. One bike weighs around 42 pounds with 42T cassette. The other bike has Rohloff hub with 50T equivalent and weighs 73 pounds. Does the lighter weight of the one bike make up for the gearing advantage of the heavier bike for hill climbing ability. Assume same rider, motor, tires, and both full suspension. One is a Carbon frame (lighter) and the other is Aluminum. Any thoughts?