I had both of them. ECX is a reaaaally tough truck. My 6yo drove it many times at full speed against our backyard fence and never broke (120A esc and 7.5T sensored motor). Hot Racing has some sweet upgrades for it too. Slash was an awesome bash or racing truck had a lot of fun doing both. If your looking to bash only, go for the ECX. For my experience that thing was almost impossible to break.