About address search in NT versus NTU maps: might it be that NTU maps have less searchable addresses than NT maps?

I did install CN Europe NT 2015.2 and CN Europe NTU 2015.4 to Mapsource on my pc. When searching for the street "Martony-Gasse" in Austria I do find it in the older NT 2015.2 but not in the newer NTU 2015.4. Nevertheless in NTU 2015.4 this "Martony-Gasse" is displayed on the map!

I am curious what will be about "Martony-Gasse" in NT 2015.4..