Those are two different maps. Have always been. The Garmin Thailand v3.3 uses the 2014.40 Navteq map while the standalone maps for Garmin devices are built by ESRI/ Nostra. The latter is IMHO much more detailed and up-to-date. Another important difference is that the Navteq map uses Foursquare as its search database while ESRI/ Nostra has it in the maps database.
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