(*ignore please the Ground, Background, and Lighting; this is Only a test for Material Nodes)

First let me say I am only now exploring the Cycles node and have only watched a few Blender Tutorials. What I have here is an FBX model and the creator supplies the following Maps:

Color Map Roughness Map Metal Map AO Map Normal Map

The Front vehicle is using PhysicalSurce and the Rear vehicle is my first attempt to use Cycles. Rendered in SuperFly, using the stock Ultra (GPU) render setting. Lights are just the P12 supplied SuperFly "Overhead" set with some values turned up. But the Cycles appears 'flat' to me. The metal surfaces have lost their luster and 'surface roughness'? I like how Cycles tamed the shine on the leather, but even it appears 'flat' and without roughness to it. Is there something missing in my node set up? Does this need to be set up 'deeper', with Clamp Nodes and such (which I am still trying to grasp the theroy of their operation)

These are the two Render Nodes as I set them up:

I am not online 24/7 so please don't be offended if I don't check back in for a day