Oral exams have very little in common with job talks. Your committee comes into the oral with prepared questions designed to tear you a new one and to leave you feeling intellectually inadequate. In fact, the better your written answers, the more grueling your oral.
A job talk, by contrast, involves you talking about the thing you know better than anyone else: your research. You spend a long time preparing your talk. And you do several practice runs, with practice questions, to ready yourself against tough and, more important, out-in-left-field questions.
Crucially, you have more prep time than the questioners do for a job talk. For oral comps, the opposite is the case. And for me, that makes them very different experiences.