The 2 stroke one will always be quicker as it fires every stroke not every other stroke., but it wont feel as strong as the the 4 stroke.
The 4 stroke agility will be more reliable in the long run, will do more than double the gas mileage and not need to be filled with 2 stroke oil all the time.
Its all about personal choice, but the 2 stroke will always be a bit faster.