Actually I'd disagree with you there. Between my guitar and Bulb's guitar they actually sound REMARKABLY similar. I'd attribute this much more significantly to the neck, and to a lesser degree the body, but absolutely not the top. The tops on these guitars are actually fairly thin and since it is hollowed out inside you're looking at way less influence on the tone than the solid wood of the neck and I-beams and the body wood has a greater surface area than the top does as it covers both the back and the extra thick sides.
Aaahh ok, interesting! That seems to make sense; I hadn't thought of it that way. Thanks for the information!