I have similar issues when I export as an obj with ngons and import into 3D Coat as a surface object (not voxel object). The topology is terrible. I am told by the 3D Coat crowd 3D Coat does not like ngons or tris and prefers quads. Yet when I export using the quad option, I get way more tris than quads.

Too bad MOI3D did not have an all quad export option with as few tris as possible.