Well,
I already changed the power supply and I was using a 5A bench power supply. Nevertheless I get another one PS (5V,3A) I checked again, but nothing changed.
So I changed the whole RP3. Now, I don't get dmesg power related warnings and also I can see: "Bus 001 Device 004: ID 03c3" if I do lsusb, so I can start to check things.
It's clear now that the other RP3 has some kind of problem, I will try to flash the SD Card again, and if not, check the "soldering"...
Long story short, thank you, at least your anwser made me check new things and now I have less concerns. Problem Solved!
Kind regards