Ok. I'm going to say this and risk looking like an idiot and will swallow my shame if I am WAY off.
But to me, the OP horse almost looks to be carrying some dun factor. His legs, while having black points, don't scream bay to me. Plus, the shading on the muzzle and behind the legs.
He also looks young, and I know the younger, the more deceiving.
As for the other bay I was in question of, the shading around the muzzle and from what I see behind the legs says brown to me, as that's not an apparent sun-bleached place. But...Bay and Brown haunt me so.
Riding: The art of keeping a horse between you and the ground.