Drops bars don't fold well. Bull bars or low profile bars made from upsidedown cut down drops work well on bromptons, downtubes,space genies, and mezzos in my experience.
You get the same hand postons virtually. See some of my threads on fitting dahon andros stem extender to Brompton, mission space genie, or the upgrading a mezzo thread.http://www.bikeforums.net/folding-bi...-advice-2.html