Ever looked into Pro 4??
Well, Pro 2 is older than the Pro 3.. of course they haved improved the Pro 3 based on the Pro 2... what im trying to say is.. Pro 3 is more improved than the Pro 2, but you still you can beat a Pro 3 with a Pro 2. Everything is based on your capability of tuning a car. Someone could have a $1000 electric and lose to a guy that can tune on a $200 car.