I agree with everything Tom said except for one point, the weight of the engine and system. A RAM 500 is about 1 to 1 1/2 pounds lighter then a RAM 1000, P-120, etc. My BobCat weighs 17.5 pounds with the 500 and a monokote covered wing and stab. And the take-off weight is a lot less with the smaller fuel supply. This gives me a much lighter BobCat then the XL's I've seen. And since it's the same wing the loading is significantly less. Which all translates into a nimbler plane. Maybe it's my pattern background but I like that.

But then it's all probably a sales pitch.