I think that is their N52 motor. It's IMO a very nice engine. Your car will produce more output and it will be lighter. I think at a drag strip you may win. On the street you will both lose.
No matter who has the faster car if he has any sense at all you won't be able to make him regret spending the cash. All you'll have is a faster car -- not a better or more interesting car after all. I know this, I own an Impreza too.