ive raced a few 400exs myself also and my warrior seemed faster easily, and ive never drag raced z400s but a few buddys of mine have them and i keep up with them fine in the woods, imo warriors can really haul *** in the woods there nice and low and have an overall good feel and i myself can really fly in the xc terrain with my warrior and i dont even have any suspension mods, its just a little wider with good tires.