Taller, bigger, and heavier than the rx200 but not uncomfortable. Not a pocket mod by any definition. The ultem drone should be lighter weight.Love that mod. Looks classic. But if I were to go regulated I would want a dual that could push whatever build I could put on it. I like the 250 Drone. It looks smaller and lighter than the Ohm Boy. It appears about the size of a Reauleaux which I could live with. I really like the looks of them also.