Be advised the Riv bikes can be a little 'quirky' as to what fits on them.
What do mean?
This is not to denigrate the Rivs or Heron bikes, just that they are a little 'different' than the norm.
What is the "norm"? I don’t think you’re referring to the bike, but the Grant Petersen/Rivendell philosophy; comfort, function, wool jerseys, leather saddles, lugged steel, threaded stems at saddle height, etc…
I'd be surprised if you were referring to the bikes, because the Oswalds seem to be a fine quality lugged steel frame, hand built by craftsman similar to the Riv and Waterford. Didn't spend too much time on Oswalds site, but did see they offer road and touring geometries. Went with the Heron because like the Riv and Waterford, a custom hand built lugged stell frame was out of my price range. Decided on the Heron over the Atlantis because the Heron is made in US at the Waterford plant, and the Atl. isn't.
Ted