In reply to:
I don't think Volvo would say something like "less likely to kill or cripple people in the other car." It seems like it's something they would be sued for and it's probably not the best advertising slogan. But I could be wrong.
They could say that if they could prove it to be true.
I recall in the late 80's after the Tylenol laced with cynanide actually killed some people - some competitors were advertising that "our product won't kill you"
[unlike Tylenol]
So if you can say that in a ad, why not the above?