I don't think anyone pointed this out yet, but right now in the greencarjournal database, the HCH II and Prius II are tied at 48 mpg real-world driving data (with the MT HCH I). Granted, there's only 10 cars contributing to the HCH II data, but there you have it.

Not enough of an incentive for me to give up my '04 HCH MT for either, not when it still only has 15k on it.