I will concede that it's not a perfect comparison as the servo stands are more omni-directional than the H-Frames which have a Figure-8 radiation pattern, and that will greatly help with output and low end extension.
My servo stands work best in a narrow/small room with a little reinforcement from side walls, in my current living room, that's not possible, so I loose some low end extension, but it still wins in terms of overall speed/detail.