Sort of a distinction without a difference. same polymer, same coating, lenses with front sides and backsides, sold at obscene prices, with nonsense marketing and a roster of names for "different" products which for the most part, are all the same. somehow and by magic, E can sell a "lower" level progressive on line direct to consumer (frames direct?) with no problem, without eyecodes and visioffices and pixie opti dust. …