Exactly as you said. And exact setting gived me same low effect as sweep and edgesrf in Rhino. So I was not right about high CP count in MoI Network surface. I`ve read that about Rhino that is should be omitted if possible.

... but why sweep2 in MoI has higher CP count than multiply CP of surrounding edges? Exact setting on sweep in MoI also should give similar effect to network exact. Isn`t it? Why one row is higher?

Network surface from MoI (exact setting):


Network surface from MoI (lighter setting):