Quote Originally Posted by indysteel View Post
So, as a starting place, you might want to identify what's difference between your bikes' respective geometries to see if that provides some guidance as to why one is comfortable and one isn't.
Yes, do this down to the difference in the bars, the brake hoods, the angle of the hood to the bar on the horizontal (look at them from the side) and angle turned in/out. For instance, I get wrist pain unless my hoods are angled just slightly inward, and the right more than the left.

It can be a difference in the shock absorption of the forks on each bike through I would expect the Surly to have a softer riding fork. But the bar on it may be less shock absorptive depending on the material and model.