@l i am said:
I find it interesting that the sketchup dufusion and stable diffusion gave a very similar treatment to both images. For instance the sky is almost identical as is the lighting. The only difference I can see is the material mapping and roughness. I wonder why this is?
The Sketchup Diffusion Output is the Stable diffusion input. That is the reason both look similar but stable diffusion img2img devellops it a bit further to a better result.