There never was and hasnt been since, a tougher rig out of the box than the Savage. doesn't matter what brand you put up against a Savage its probably going to break first. Not that I havent seen Savages break in the first 10 minutes of running them too, especially given the kind of hard core bashing you do. e.g. motocross jumps and skate parks.
Anecdotal evidence. In my experience I had waaaaaaay more trouble with the firestorm than any of the 3 Rustlers I've owned. So much so that I sold the Firestorm less than 2 months after buying it. Not only did I have less trouble with the Rustlers there were a lot more after market parts available for them to make them tougher.
Losi is a full fledged race brand and racing brands typically have higher quality rigs than non racing brands but again anything can break.
Again racing brand vs non racing brand and still anecdotal evidence.
When your putting RCs 15+ ft in the air your going to break something on any rig and frequently. Everytime I go out bashing I take 3 rigs with me because I know I'm going to break stuff. I consider it a good day if I can bring home just 1 out of 3 rigs still working and I own all sort of different brands. Point is, they all break and the harder you bash em the more often that happens.
Just my