Ju
The NV cabs are very different from the CN/HDN cabs. NV are sealed, CN are ported. NV are loaded with ceramic drivers, CN are Neo. NV are pretty heavy for modern cabs (because of the ceramic drivers), the CN cabs are very light. My NV212t = 70lbs vs 46lbs for the CN212 with both cabs being the same dimensions.
I've had both ... NV610 and currently an NV212t, along with the CN212 and CN112. Both Berg types sound great, and in fact, I am starting to favor the NV212t with my Walkabout .. seems like a great match (other than power ... NV212t is 8ohms, so the WA only delivers ~165w into that cab), but its a sweet combination. The NV610 was 4ohms and the WA killed through it, but man was that a heavy cab .. and ultimately way more than I needed.
IMO/IME, I would say CN/HDN are more modern, even and full across the spectrum. (although with the horn turned down and appropriate EQing they can do old-school thump no problem). The NV cabs (NV = "new vintage") are more old school thump from the get-go .. although if you turn the horn up on the NV's they can get very shiny up top.
So, much depends on what your tone goals are. I'd probably go with the CN212 as a great all-round cab choice. The NV's are great cabs but will be a bit more specifically voiced with a fairly steep low end roll-off and a bit of a low mid bump.
good luck