It's not nec. that its better, its just that the b4.2 is better right out of the box. The dex210 has so many tuning options it can take some time to get it dialed in. My friend has one and he hated it in the beginning because it always broke or ballcups kept popping off and it couldn't turn to save its life. After a month or so and time spent on tuning it/upgrading some parts hes really starting to like it.