I have never come across a more boring, monotonous drone on TV than Mr Starkey! He has the ability to make even the most fascinating subject seem tedious and dull. Whenever he is on the TV I find myself nodding off after 10 minutes or so.
Mary Beard, on the other hand, is dynamic and engaging and brings the subject to life, making me sit up and take notice.
I'm sure they both know their subject inside out. But knowledge of a subject doesn't make one a good teacher or, as in this case, a good presenter.