You can take a look at the full UAD 1073 here.
Without the EQ section of the 1073, the preamp has a bit more low end and doesn’t roll off where you can really hear anything. The harmonic/noise modeling seems pretty close between the two plugins, other than a couple of low end spikes in the preamp. (It’s hum, man!)
I really like this as a simple unison plugin. You get the benefit of the 1073 preamp sound, and then can feed it into your own choice of EQ in the console app.