Looking for similar look in Marmoset...

[Reddler]

I want the best export configuration when it comes to achieving the roughness effect like in Substance Painter. In Marmoset, the difference of materials isn't even noticeable. If you don't feel like spelling it out for me, I'd be very grateful if you suggested a certain tutorial. Thank you for your time in advance.

[volker]

The effect is dependent on lights and HDRI lighting obviously. Strong highlights will not be visible the same way if you do not use the exact same HDR image with same rotation setting in Marmoset.

I also can't tell if the textures were correctly assigned to the material in Marmoset, or e.g. if you use the correct normal map format ect, as there are no details about that in your posting.