Why would you pick a PHEV for comparison? They are going to get a worse MPGe (because of the extra weight) and have a smaller battery (no catching up on charging during the weekend).
But more importantly, they can backup to gas so if you can only do 80% of your trip electric there is no real problem, you still are getting great fuel economy.
But more importantly, they can backup to gas so if you can only do 80% of your trip electric there is no real problem, you still are getting great fuel economy.