Usually, when two of these are set up, one is on either side of the lectern so that the speaker can look around at the audience and always be able to see one, so the same text would be on each one. I am not near a TV at the moment, so I don’t know if he is using one or two.
I believe it was two today according to an earlier post by an observer describing a tennis match like action. It was a road trip as it turns out so he couldn’t have the new head-on wide screen.
I cannot believe I just typed that paragraph about a president of the United States.