Oh, man! There are literally dozens of both, with the number of variant models and subtypes kicking the number into the hundreds. It might be worth a couple of vanity posts for an archive and spotting guide, helpful for those who spot one in a news photo or clip.
Or as an alternative, maybe we could talk SamWolf into devoting two of his interesting and informative *Treadhead Tuesdays* to the subjects, with maybe a third for 8-wheelers. Oh, SamWolf...>