Joshua has both as well, I can't remember the type of trike we have, but he just started actually being able to ride it properly. He is having trouble with the balance bike as he says it hurts to sit on it. But I think he is too short so he leans forward and squishes his penis. Lol.
We have both the pink strider and a tricycle. She isn't really into either but likes the strider better out of the 2 right now. Pedaling is a foreign concept