I took the time to try and replicate your image. It isn't an exact match, since I don't know a lot about the specifics of your setup (rendering kernel used, lighting environment used, specular settings, camera setttings, etc), but it is relatively close.

This is a direct export/import from MoI to Octane. As you can see, I am not getting the issues that you are, so there must be something specific that you are doing that causes the issue.

Here is the Octane render:



And here is the screen capture from MoI:



And here are the export settings for MoI: