It's because you only posted pictures with a shader before you updated the screenshots. And as we all know, shaders typically increase saturation and vibrancy of the game. Not to mention that the description is clickbait/AI generated ("optimized performance" in what way?, "realism" but it's 16x?, "realistic lighting" but it doesn't really change lighting?). For anyone wondering, its just a very saturated and contrasted version of every vanilla texture (could honestly be useful in some scenarios or if you are looking for visuals for gameplay). Seems to be all generated by a program.
* Author changed the description