454cid
Sooper Pooper
How is it not the same thing? A prerunner and mud truck are just as much meant for different terrain as the average lifted DD and a motorcycle, if not more so. They're built for different purposes. Just because there's an area where one doesn't perform as well as the other, doesn't mean it doesn't have it's own advantages. There's pros and cons to every setup.
A pre-runner and mud truck are still basically the same. They're modified forms of the same vehicle. A motorcycle is completely different to start with.
I think what the OP is seeing is lifted daily drivers, that are lifted beyond what's usable for offroading, not real trail rigs.