SeeYou v4.01 Maps

On the Naviter site, when you upgrade from SeeYou v3.95 to v4.01,
you're presented with an opportunity to buy Vector Maps. I searched
the Naviter site and their forums, and didn't find any information as
to why you might want to buy the Vector Map product. The description
of v4.01 of SeeYou clearly states that it downloads "vector maps from
the cloud", so the Vector Map product doesn't seem to offer any
value.

Can anyone on RAS tell me what increase in content, resolution or
performance one would realize by buying the Vector Maps product? If
someone has comments about the Naviter Satellite Images product, would
you please pass them on, too?

Thanks!

-John