^^^The top bike IS an HD. My understanding is that the old tear drop tubing was(according to IRO) "Cro Mo" and the new round tubing is Dedacciai(not Deccadi like it says on the IRO site). My gf bought an HD a while back and it had the tear drop tubes. It suffered a horrible fate and was replaced(at half price but not without major hassles) by a new Heidi with round tubes.
Old:
New!:
