However, I would like to point out the differences in the rendering I found, by comparing the same exact scene rendered in Octane Standalone (v1.0 beta 3.03) VS the Maya Plugin (beta 3.0b).
In the scenes, I'm using the same exact parameters for every materials, same rendering settings, same camera color presets, everything is absolutely identical.
As you can see in this first sample (sorry, I cannot post the entire image due to NDA), you can clearly see how the specular rendered in the Maya plugin is way weaker compared to the same settings in Octane standalone.
Also notice in the right-lower corner, how the occlusion is much darker in the Maya plugin (both were rendered in Path Tracing), and also some weird black detail is introduced as well.

Regarding the colors, I can see some differences as well. I know that in Octane Standalone beta 3.03, some work regarding the colors has been done. Perhaps the same adjustments are not yet been ported to the Maya plugin?
Here you can see how the standalone color are more vivid and saturated than the Maya version.

I will keep re-render the same scene with newer version until I can get the exact same result.
Does anybody else have tried this experiment?
