Hi mate,
If I may say my opinion about which map is now better than?..
the best map at this moment is the Here 2019 Q2, I drove with the Here map to Spain (from home to Belgium then to Frans then to Spain) and back, the maps displayed all the road signs correctly and on time too, so far I did not notice any major -big- errors (but a very few incorrect km speed displayed) on this newer and updated Here map, that previous (Here) was not updated at all hence I had to use tom tom 2018, but all on all the Here map is expanded in terms of road signs and road information etc comparable with tomtom map which its does not show.
Good luck with your choice.