You're forgetting one small detail.
Take one internal combustion powered and one electric powered vehicle, run both across their full range, until both are empty. Yes, you may get a similar distance.
Now comes the crunch. Recharge time.
At the same time you plug the electric car in, start to fill the internal combustion vehicle with fuel.
Five-ten minutes later, when the internal combustion vehicle's full of juice, unplug the electric car.
Mind if I take the internal combustion vehicle for this second round?
I doubt you'll get off the bottom of the motorway sliproad - whilst I'll be ready for another full range.