It's unusual to me that so many "head light" rackets are being pushed so far in to the "power" category. Imo head-light rackets are generally harder to extract power out of but offer better defence and overall speed. Typically head heavy rackets are actually the one's I find you can get more power with provided you have the swing.
Looking at the graph, it doesn't make a whole lot of sense in the control category either. I'd imagine this was made more to simply try and find a position for their different racket models and marketed selling points as oppose to actually being particularly accurate.