Hybrids used to be pretty poor back in the day, but over the years, manufacturers figured out how to incorporate an electric motor and batteries better. Plug-in hybrids are more of the same, but they come with larger battery packs which allow for more electric-only driving. If your commute falls within a plug-in car's range, it's worth going for. You could go for weeks without using a drop of fuel. Thus, the main difference between hybrid and electric hybrid cars is how much they save you on actual gas. This depends entirely on your driving habits, though.