I would expect a Pirelli tire to be more performance biased. Since you're running a car tire on the rear, I assume you're more concerned with mileage than with cornering performance.
That said, the Pirelli will probably be sticker thus softer than a comparable Metzler, Avon or Dunlop and as such not last as long. This is all conjecture on my part, only based with past experience with Pirelli tires on sport bikes and cars.