>>1496723I have both of these saddles. the swallow is more a sporty profile and has an option for titanium rails. whereas the the b-17 imperial, has the cutout on top and hthe holes for lacing the bottom together. I have done that, and what I found is that it winds with the exact profile as the swallow. I have not quite broke it in yet and I have found that is not as comfortable as the swallow. I suspect that will change as I break it in or it breaks me in.