i think there is no difference between these two. basically it is just a matter of the driving style - to achieve the best joy out of touring or drifting you need a different setting.
You should first go to Yahoo to find out what is "DRIFT CAR"
Drift car and Touring car (non-drift car) are totalling different in terms of control and car settings.
With a 4WD Touring car, change the wheels from racing wheels to Drift wheels and adjust the car settings (i.e. Shocks, spring, camber, etc), your Touring car will become a Drift car.
They belong to different classes. Your question is like comparing Dogs with Cats. Both are pets with different features.