I don't own a DBX 160VU, but I do own a vintage 162 and a pair of vintage 903 modules (silver sided). The 903's sound darn good, but not quite as good as the 162. It's kind of hard to say in what way, but the 162 just has a little more bloom on the sound. It's close though.
I prefer the older silver sided 903's over the newer versions. Again, it's subtle, but the older units have that little extra mojo to them that the newer non silver sided ones don't quite seem to have.