Not sure about Black Crowes tone specifically. I've seen them with everything from mic'd tweeds to 65Amps (Royal Albert I think....)
My take...and it's only my take... is that the HX/DA is definitely more flexible. The MDT, evidently from the name, goes from Tweed to Dumble (with marshall in the middle) depending on the gain setting, but I don't see it that way. At lower volume (gain) settings, it's certainly more tweed-like than at higher settings, but I'm not sure I'd call it tweed. Similarly, the high gain settings don't respond all that similar to a Dumble ODS for example. The mid-gain settings do resemble Marshall, more or less. Personally, I think PRS does a disservice to the MDT by implying the similarites to other brands though, because I think that it has a personality all its own at all gain settings. It's a great single channel amp, that has just enough clean headroom for most people's needs, and a really nice smooth gain tone. It responds particularly well to boosts up front. I see the MDT as a gainier, hot-rodded JTM45, but even that doesn't do it justice. It's really its own thing.
The HX/DA on the other hand really is modelled towards a Marshall plexi, both according to my understanding, and my experience. The three HX/DA switches, along with the EQ settings, let you get most of the vintage Marshall tones that one would recognize.
If I had to pick (and fortunately, I don't) I'd pick the MDT. It can't do as much, but it does what it does so well, that it stands out to me. Having said that, I'm pretty sure that a majority of people would prefer the flexibility of the HX/DA.
Did this a while back, trying to set the two amps as close as possible by ear, for what it's worth (which is not much...youtube videos stink for this sort of comparison...particularly the way that I do them...)
I'll say this for either of them though... For you modders out there, these are a tweaker's dream. Super easy to work on. Really great construction and layout for those of us who like to monkey around with the circuits....
