The d8 is a buggy: more nimble, quicker to react, less forgiving but will yield faster lap times. The d8T is a truggy: bigger, more stable, very forgiving, kind of a lazy feel to the driving but is still a very fast class. Driving a buggy is more competitive due to the driving style and more popularity. The truggy class is more fun in my opinion. Truggies float like a cadillac over rough stuff where is with a buggy you really have to pick your line. Go to your local track and drive both and see which fits your driving style better.