Top one has no texture, just HDRI reflections
Bottom one has Diffuse and Bump Map along with HDRI reflections
This is part of a collab me and DBK are doing, where both of us are modelling the same mech based on a reference picture then creating a scene with the two twins. So keep an eye on DBK for updates!
Hope you like this one
Modelled in 3dsmax
Textures made in Photoshop