Hello from the EB side. Since I play all this stuff, and have heard most of it with DB, I thought I'd chime in.
The NL-210 is a really nice, warm mid punchy cab with a lot of sizzle up top. I haven't played the M-Line Wizzy, but this cab has very little in common with the standard Wizzy. Much louder, much deeper low end, obviously a completely different 2K+ response, and the mids are shifted up. Quite frankly, it doesn't really seem like a DB cab to me. The newest version is quite light, and while still a 210,, it is much louder and fuller than any single 112 I've heard, and most 210's on the market Also, unlike the old VL210's, the NL is highly efficient... loud per watt. It comes in a 4ohm special order version, which is nice if you are using only one and a smaller, lower powered SS head.
The Epi210UL is MUCH wider sounding... deeper bass, somewhat scooped mids, and an even more aggressive top end... everything you DB guys hate!
The only small (112/210 sized) cab I've ever heard/owned/played that would match the OP's definition of 'stupid loud' is the Schroeder 1212L... this cab is a freak of nature volume-wise. It is very voiced to the lower mids, which some like and some don't, but it will sink a wall of Wizzy's! As always, the 'small, loud, low.. you can have two of the three' comes into play... but man, does that cab scream... 42 pounds and 500 watts into it will knock a wall down. I've heard a couple of DB players using the 1210L.... GREAT sounding in a busy mix (rockabilly, etc.)... I wouldn't recommend it for a jazz trio with an acoustic piano. IMO!