Quoting from Jon's excellent post:
IMHO there's no important difference between
gis at this level of granularity.
maps implies an existing visual representation of the data (as opposed to the data itself) but I don't know if the average user is intending that distinction or not. And I don't know if I personally consider a "map" to be "open data" if the geospatial data behind it isn't open.
TL;DR: merge geospatial and gis.