Michael is pointing at her and Karl, sending the too-tight-suited man hurrying over to them.
Michael is pointing at her and Karl, sending the too-tight-suited man hurrying to them.
what is the difference in meaning?
No difference.
"over" can be added to verbs of motion to focus on the fact that someone is moving through a distance.
"over" is almost always an unnecessary extra word between a verb of motion and the preposition "to".
We show them hospitality whenever they come over to our place to visit.
Run over to the 7-Eleven and see if they have any cookies.
They went over to the casino to do some gambling.
CJ