No doubt some will think I'm flogging a dead horse here, but once again I've compared both the 2015.2 versions of SENSIS and HERE (NAVTEQ) maps. I did a check yesterday and this morning of the major roadways around Sydney, plus my usual set of new and old back streets and rural areas in the Central West and South of NSW that I know and have tested before, as well as some speed limit checks.
The latest SENSIS map includes new on-ramps on motorways that only opened in June/July this year (big clap), where as the HERE maps are still not displaying an on-ramp that opened late last year (kick in the mouth).
The rural areas I check are showing no difference in data, however the HERE maps still provide better coverage for dirt roads and off road areas.
So, my opinion is still if you use your maps in metro areas SENSIS maps are the only way to go, especially if you use main roads and motorways (where I've found the HERE data to be far too outdated). Rural is a 50/50 mix either way between the two and off road use is still taken out by HERE.