why does the Substance painter render looks far better than arnold render! (pictures)

[Jekondeck]

The texture maps are 4k in both pictures, the normals have alpha as luminance checked as well as color output:raw thanks for any help!!!

[damaggio]

Without looking at your lighting set up and your shader connections is gonna be really difficult, Arnold can render just as good.

[guccione]

easy answer - your first renders are way too dark to see what you see in the second renders, and there’s no hair in the arnold renders