The Flux in stock form is more durable, but is more "sloppy" I have a brushless 3905 Maxx and a Flux HP. I like the Flux and all, but it doesnt handle as good as my Maxx. Nor does it stay in a strait line at high speeds that well. If your willing to upgrade to RPM on some things then I would say the Maxx. But if you want durability stock then Flux.