1 - The official software is always more reliable in operation. (The soft-designed for your model of the device, even if patched)
2 The meaning of the replacement software, the desire to use the maximum number of possible functions and all the available maps. (You with the 7903 version 845.2645 unavailable-for example-so-you can not use a lot of functions)
3-Exclusion cargo maps. For them, we need a special software
Thanks for that explanation.
So should I wish to use a map with IQ and lane change technology I would need to look for a Navcore compatible with both my model and a map that was compatible with my new Navcore. I am assuming that the newer functions are included in the map and not the Navcore