I like how people talk about graphics, binding them to the things their game does best, ignoring all the rest. So enviroments look prettier in one game? That game has the best graphics, ignore everything else.
What about resolution? What about framerate? what about AA? what about texture detail? Nah, enviroments are better, thus the game has better graphics. Why? Just because.
And BTW, DC doesn't have more advanced lighting than pCARS. It's better toned now, but the tech isn't better. pCARS is still tweaking the lighting, not the tech, but the tones. It's what gives a life-like image. For reference, check the AI lights in DC, tell me they work real time, like the player's do. Do they? No, they don't. Many of the effects are baked, it's easy to see. Is it the same for pCARS. No, in pCARS every light for every car works the same, be it AI or not. So, please, stop claiming the lighting in DC is far better, when it is not. You could perfectly tell: it looks more real, that's ok. But the tech is not better.
If DC wasn't exclusive, all the people supporting it wouldn't be so adamant about it. You want to defend your 400 machine and believe that it sports a better looking game than one that requires a 1000 machine to play with ultra options 1080@60? Ok, go with it, but keep in mind you're being silly.