Is it harder for Hipmunk to build an infrastructure comparable to Orbtiz, or for Orbitz to put together a UI comparable to Hipmunk? (That said, I could definit

Is it harder for Hipmunk to build an infrastructure comparable to Orbtiz, or for Orbitz to put together a UI comparable to Hipmunk? (That said, I could definitely imagine an Orbitz/etc TechCrunch-reading management buying Hipmunk instead of assigning some devs to build it inhouse.)