I agree that I wouldn't spend too much time fretting over the lens design. And with prices as they are, there's no reason that you can't buy both at a fraction of the original price. Shoot both and stick with the one that you like the best.
Or if you really want the original, switch to a Contax (or Rolleiflex) setup and get a Planar. Zeiss has called this the most-plagiarized lens design in photographic history. That is, nearly every lens maker used the Planar design as the basis for their standard 50mm lens.
Last edited by elekm; 05-21-2013 at 11:12 AM. Click to view previous post history.