Navionics has two levels of maps.
Nautical Charts is Navionics data.
Sonar Charts is contour mapping created from unit user sonar logs.
The new Navionics+ Regional is available in REGIONS like Hotmaps Platinum and the discontinued Hotmaps Premium. They have both map layers preloaded.
As with every Navionics product, it includes a year of Freshest Data Updates.
Bottom line is the map for a particular location is the exact same one for every card version if updated the same day and is the same map that can be viewed on the Navionics website's Web App. It is also available with the mobile app for Android and iOS devices.
If you have any Navionics+ version, you have the exact same maps IF you update the card. PLUS you have a better version that is not regional specific.
Edited by Wayne P. (11/06/16 02:06 PM)
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, 360, RC-1