Ive driven the D418 indoors drove one out from a guy a race, with on hard packed pure clay it was so stable when driven hard turn in like crazy with the Front sway bar off easyier to drive fast than the D413 stock. But I still drive the D413 for now and outdoors on looser dirt its pretty good shines on it, the stock setup for it with the carbon chassis etc indoors high traction clay its ok but needs tuning for sure can be good on it. Both buggys had mod motors 6.5s turn on them.
The D418 I haven't seen it on a outdoor loose track yet but im sure its good.