I have had both the bolt on and the one piece hitches. The only difference i see is the one is welded on every where the other one bolts. The pic in the first post just shows the part that would bolt on if it didnt have a factory hitch. The big round tube that goes from frame rail to frame rail is on all the rams trailer package or not. I dont know what tow rating is but i dont think they are rated for 10k, i thought it was around 5k and with a weight distrubtion hitch it was 7,5k.