Here is my first render with Octane
It cooked for about 9min in 800x900
Average was about 3.1 Megasamples/sec
Light is an hdr map
I didn't used any spec map as the diffuse maps already reached the textures limit
I didn't apply the subsurf to avoid a huge poly count
Some postpro to add chromatic aberration and some blur in the background
Well, I started this morning and finished one hour ago ! I did a lot of test and had to simplify the scene to get it working but once it works, it is damn fast to render.