They probably have the best selection, they probably have some of the keenest prices, they probably have the best technical person behind them, they probably have the best range of options in mixing and matching lenghts ,brushes,taps and triggers.
But I don't find it that clear. If there could be some comment like this pole is for that or this is for first floor domestic, or this pole feels lighter than that one. This one has had terrific feedback etc.