I haven't personally experienced the Dmoll, yet have heard good things and specifically that it has "similar" controls to Herbert.
That said, Herbert is a BEAST!! 180 watts of headroom, great cleans, amazing crunch, and diabolical heavy tones.
In my experience, Herbert is best paired with German made Diezel cabs...yet it likes V30's in general...however personally I also like the K100's.
There seems to be some differing of opinions regarding the K100's, but I use a V30 cab on the bottom and then a K100 cab up top for live, and it's AWESOME!!!
Now, back to Herbert. Herbert has 3 distinct channels ALL with their own EQ controls.
The biggest drawback I can see on the Dmoll is the crunch and heavy channels share EQ controls.
If you can get past that, then Dmoll is cheaper and will still give you 100 watts of Diezel goodness.
You still get 2 MV controls for solo playing and midi switchable loops.
I am Herbert ALL THE WAY and I have a Hagen as well, so take my opinions with a grain of salt.
I just get as many Diezels as I can, try them, and then choose. I have tried the VH4S and Einstein too.
Many here love their Dmoll amps...that's grand.
Anybody that has some direct experience with Dmoll would probably be helpful here as well.