Hi Paolo, yeah although they can sometimes use the same set of curves, Network and Sweep calculate their result differently.

Network is actually more related to Loft, and actually internally the calculation does do 2 Lofts, one through the U curves and another through the V curves, then those surfaces are combined together to produce the final result. It's kind of more of an averaging process between all curves.

Sweep is more like sliding a rigid frame along the rail curves.

- Michael