I think this is more of a consequence of game design philosophy. For example, if you make expansive or open world games the effort is put into creating tools to generate vegetation, lighting, effects for a general case which is different from games which tend to be in a smaller scope that can have a more focused effort put in a space.
Even within the PC only developers you see how a more narrow scope/environment can allow for more unique objects, better, more unique textures, etc.
There is also the function of money in that PC focused have historically tended to have less budgets than some of the console games which pushes developers in the direction of cheaper practices.
Aside from that I think one could fairly say that PC has tended to aim for a type of realism that is in contrast to some console games that have flourishes in the art and design. But it's hard to separate it from those other issues.
The one last contrast to make is a distinction between character centric and environment centric design. Games like Demon's Souls and Dragon's Dogma that are supposedly western in their approach have nice looking environments but how they really stand out is in the design of the armor, the monsters, etc (even when the faces are a type of ugly that can only be generated with sliders) whereas the western games will tend to stand out for having the sun set on a mountain range in a jungle, a boreal forest, whatever nice textures on the ground, etc
edit: another one. actual vs exaggerated. many western developers have an actual focused design which can lead to generic looking characters that don't stand out. exaggeration does exist here but it tends to be in sexual dimorphism (men have huge muscles, women have wide hips, big breasts) or the odd/ugly (like Tim Burton) whereas in asian design you tend to see exaggerated attractiveness (impossibly perfect faces flaunting over the top fashion). the focus on realism in PC has led to a games that are actualizations of things more than they are ideal representations of them - so you see Crysis have ever more detailed models... of mosly ugly dudes.