The Novotny bike has wheels bigger than 20", a mono fork and a mainframe consisting of four tubes. That's about it regarding the similarities aside from the look when unfolded. In the german folding bike forum we had a discussion about it vs. the Helix already years ago - while the look is similar the whole implementation is different and the wheels are 26" or 28". Folding bikes are about folding and the fold is different in every aspect - the Novotny folds simpler and ends up far less compact when folded. When unfolded the mainframe of the Novotny has a bit of a slope.