Thread: using a mixe of HERE and TT maps possible?

Yes, it should work. I use TT 2015.06 maps together with the 2015Q2 POI's plus extended POI's (did not update yet)

I was convinced my buildings were HERE origin too, but checking just now pointed out it are TT 3dc/3dl. However I am pretty sute the HERE buildings are as functional as the TT buildings in combination with TT maps. It should also work the other way around.

Edit
I forgot to write that you can even mix HERE and TT POI files in one map. They will show double on screen when a poi is in both.

The weight of the HERE and TomTom maps files being very consistent (several MB), the idea is to optimize the use of iGO (fluidity and light). So, I'm looking to find out which files are "common" for HERE and TomTom maps in order to use one or the other but not both at once.
I know that the maps landscape dem are common.
I guess fbl, fpa, fsp, fda, hnr, ftr, fjw files are HERE or TomTom specific, therefore not substitutable.
On the other hand, I think that the buildings 3dc and 3dl files are not specific and can substitute one for the othe. Isn't it?
Regards