Look at the traps, which suggest he isn't on any androgens in those pics. They are usually the give-away. However, today society is so drug infested he and everyone else is likely on some drug that could be called a PED. But significant anabolics, no. A true natural can oftentimes get somewhat drier and more shredded looking if they have the OCD mindset making them diet for years. And this kid has that look.
A dream subject to experiment with PEDs on when in an ultra ripped state, young and drug sensitive. I always think what the guy would look like in 2-3-6 weeks with drug X, Y and Z. Not size gains per se, but the look more like, you would see the minutest changes.