Native Octane Geometry
As a rule, the c4doctane plugin does not directly generate geometric objects, unlike OctaneRender® Standalone, which can create a variety of primitives. The one exception to this is the Octane Vectron object. Vectron is a procedural primitive, bypassing meshes and volumes, with virtually no impact on VRAM. Vectron objects are explained here.
The c4doctane plugin operates on any geometric data format from within Cinema 4D, but Octane also has its own object and material package format called ORBX (discussed here). ORBX is used as an interchange format among all of the Octane plugins as well as Octane Standalone and The Render Network. ORBX is an encapsulation of all scene data that Octane can process; it is not a proxy format. As a result, animation files in the ORBX format can get rather large. Octane can create ORBX files from within Cinema 4D via the Live Viewer, as explained here.
The Octane Scatter object is effectively a simpler version of the Cinema 4D Mograph cloner, where a source object is distributed along a target object or area. Don't mistake its reduced functionality for a lack of power, however. The Octane Scatter object is capable, literally, of creating worlds on the GPU, from the micro to the macro, and typically quicker and with less resource consumption than a Mograph cloner. Octane Scatter is discussed here.