A reliable source tells me the X181 and the Powerbow gen X are in fact the same shape. So a long sweet spot starting low and heading up to traditional centre. They are however scalloped to make them a little lighter, meaning if you hit off center you lose some power. The Matrix has a similar length middle but is not scalloped and therefore a little heavier but is more forgiving if you get one off center. I would give both a go, if you can live with the extra weight on the matrix it may be the go, if anything I wish my bat was less scalloped.