Most campaign speeches tend to be repeated over and over again, but most politicians will switch it up from time to time, add things about the particular town or city he is in, or delete old stuff. That’s to be expected. I don’t expect a politician, or anyone else, to go from one event to another and have a completely fresh speech at each stop.
But, it does seem that Rubio, more than most, repeats his standard speech over without any changes.
Which will become really obvious if he ever makes it to an actual one on one debate (rather than the media event soundbite competitions with a dozen people on the stage).