Hi,
I have used both. If you are a clydesdale, you want the premium leather on either saddle. The Flyer is supposed to be the same size as the B17 but for whatever reason the nose felt shorter to me.

You can get some bobbing, but it goes away once you start pedalling smoothly.

If you have big hips; you might find these saddles cramped. You prob don't have really big hips.

The springs do take the edge off nasty bumps.