One distinction is that the comments made by the developer were directed at his colleague, while her tweet was directed to the public, or at the very least to those that followed her on Twitter at the time of her tweet.
That's the distinction. The joker made a private comment, which was made public by a third party. Adria made a public statement. There's no hypocrisy here; Adria wanted attention to her comment.
Was there a large audience to the comment? Was it directed at a general group of people? No. It was directed at a single other person, and she happened to overhear it. So it was private. That it was made in public and within earshot of others does not make it a public statement.