I have been through solid state, digital mod and several tube amps since 20 odd years. Lots of high endish stuff in their respective categories, still owning a Hughes&Kettner Zentera and a Kasha Amps Evil Robot Custom214 from the original Magnatone Tonemaster re-issue series.
The DT50 is clearly a real tube amp, very dynamic and with great tones available at lower and enue volumes. The two fully identical channels are a feature that I started really enjoying when I removed the OEM suggested HD500 connection and started using it with my pedals.
The beauty of this beast is that it reacts as dynamic as only tue amps do, with nice sagging and compressing of saturated tubes, but in combination with this huge versitality of the four Fender, Marshall, Vox and Mesa voicings. It is truly like having 4 amps in one!
While the HD500 puts it back in the world of modelling, with too perfect, effect rich sounds (as HiFi as the Zentera does it, too), the DT50 alone with pedals gives this rawness that only classic rigs can provide.