You can see an image of the Sarpo's, including the new introductions, in a blogpost I wrote following the 2009 open day at the Sarvari Research Trust.
To say they are in 'a different league', is spot on. Anyone interested in developing their gardening (or indeed their food growing business) along low carbon, earth-friendly lines, needs to be growing Sarpo varieties.
http://www.landscapejuice.com/2009/08/new-sarpo-superspuds-lead-the-way-in-low-carbon-gardening.html
http://www.landscapejuice.com/john-walker/