You can't compare the version numbers of Maemo Ovi Maps to Symbian Ovi Maps. For example, Maemo Ovi Maps 1.0 has 3D buildings, which Symbian Ovi (Nokia) Maps didn't have in version 1.0.

So by saying Maemo has "only" version 1.0 compared to Symbian is meaningless. It's a completely different product which happens to have the same name.