All of the manufacturers would say that you should have a matched set of their cables. Once a seller sells you a set of cables, saying that having a matched set will sound even better, thus opening up many more sales. So you can see where this advice comes from.
I don't even consider is.
Of course I only have one cable of each type: one ethernet cable, one usb cable, one set of interconnects to my amp, one set of speaker cables. All are a differt signal in a different application. So even if they were the same brand, they would all be different.
Jerry