Then I was right with my statement: "My gut feeling tell me TomTom has basic junction view data as part of the map and HERE is using better junction view from .fjw" So can you do this?
Test 1:
Use TomTom map .fbl but also use HERE junction view .fjw and see if the "better" junction views are showing. Low probability that this will work since junction view data are pretty much tied to a map structure; but who knows, you might get lucky.
Test 2:
Use HERE map .fbl but do NOT use HERE junction view .fjw (don't copy file over). See if you're ONLY seeing the "simple" junction views.
In both cases, verify what you see under About->Content
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