That is a big difference there, my money being on the fact that they weren't like the second example....
I got into some hot water with (what I assume was a rookie) a Jeffco Deputy a few years back while on leave. I was in my mom's pickup truck, got stopped in Evergreen at 11:30ish PM for going 40 in a 35. He asked for consent to search, I refused, he claimed that refusal alone was probable cause because I was "hiding something." A supervisor was called in- who turned out to be a friend of mine- and in the end a 20min traffic stop turned into a 40min one, but at least I didn't have my rights violated. Stick to your guns. YMMV.