The Tom Tom Mapas give you better and more clever routes to your destination.

In opposition HERE mapas give you crazy routes.

Here mapas have road signs, and can show you the road signs if you program your device to do that. Tom Tom, even with this feature activated, does not show you the road signs!

If you can afford to have two devices, and put Tom Tom mapas in one, and HERE maps in another, you will always have two alternative paths to your destination.

Both have streets in their content, an can give you a path to your destination (Here more crazy, but you will eventually get to your destination).

Best regards, and have nice routes.