Truggy is easier yes.
Truggy's are more forgiving when talking about ease of driving. A truggy can be pushed more in the corners and have less body roll. When I flip flop between buggy and truggy it takes me a bit to ease up on the throttle with my buggy.. I like driving truggy more because of the aesthetic appeal. However, if you daughter learns to drive a buggy well she will in fact be able to drive a truggy very well..
Buggys are more nimble and prone to directional changes.. truggys are not..