You read from some random person that they said something and now you're telling us? What are we going to do with this information? Why don't you ignore this stuff and have a look yourself and tell us your own opinion.Just a heads up, I just read on Reddit that Telles is pretty slow, especially for a fullback. Obviously he's faster than Maguire, but the issue is that he likes to attack and can't track back efficiently because of his pace. That can result in Telles fouling the opponent or leaving space open on the flanks.
I'm not an expert on Telles myself but from what I read he seems like a more technical fullback rather than fast and overlapping one.