Two different material not only in color but also in texturing.
Each Base color have 3 Different texture that assigned on wood.
you can adjust displacement value through the way you want to play with height but i recommend create High polygon Shape and put displacement value on 3 to have better result.
2k pbr material
this file contain:
2016 3ds max
obj
fbx
material library
and also you have textures:
Base Color
Ambient occlusion
Normal
Height
Roughness