You are on the right track, but I am not sure if you can go all the way on Ilustrator alone. To be more specific, how the textures wrap arround the curved objects and the bumps on some of this textures.
The second image could be a 3D render, probably using an ambient occlussion render. But also in 3D you have tools to make the bumps on the textures.
A quick test using only ambient oclussion on the Blender Internal renderer.
If you want to keep on the Ilustrator path, add some shadows.
If you want to go on the 3D render path, use Blender. The shapes are pretty easy to make. It is not Photorealistic. I would use the Blender internal Render and ambient oclussion, not Cycles render. A very difusse light is also needed.
To simulate the isometric look use a veeeeeeery long lens and put your camera far away.
Another option is to use Sketchup+Kerkythea, both free, but I like more the blender option because it is all integrated in one. But also you have more freedom to trace the shadows separately.