Sisko demands more from his officers than Picard. Jean-Luc was always a relatively laid back commander of his men (and women, and androids), a more magnanimous presence who sought advice and proceeded based on that. Sisko is more battle-hardened. From the very start of the show we see that his life in Starfleet has resulted in him getting an edge to him. He's less likely to give his officers the same autonomy that Picard often did. If any of them step out of line they'll soon know about it. Worf, of course, was still adjusting to having joined Deep Space Nine from the Enterprise, and was finding his feet with his new commander. Sisko giving Worf a hard time is as much about establishing that he won't tolerate as much as Picard used to.