It's small talk both times, you just don't like forced conversation with your coworker. And that's fine, but they're both small talk. And no, I strongly disagree that it's defined as answers you don't care about the answer to. Many people who describe themselves as enjoying small talk do care about the answers, or else they wouldn't be asking them or they'd be asking something else.
I don't know why people have defined small talk as some exclusively negative thing. It'd be like someone saying riding a bike isn't exercising because it's fun.