Re time. In most cases MoI is several times quicker. Where ZBrush creamed MoI was the flexible cable mesh insert brushes. Very quick to do and edit. A few of the other parts were done with mesh insert brushes so were quick to do. I obviously had to model these parts before copying and pasting them.

Plus of course MoI has accurate angles etc. A lot of the ZBrush modelling is by eye e.g. matching angles of parts.