I can only compare to VH4, where from my perspective CH3 on the VHX is more or less similar to VH4.
CH2 sounds for me a little more compressed on the VHX, but this might also be some tweaking issues on my side, and I have not tried to nail the VHX to a certain other Diezel Amp, I mean you get a very versatile, great sounding amp with some nice extra features.
The VH4 has already been very versatile, basically difficult to get a bad sound out of it, but the VHX gives you the possibility to store and recall these settings instantly. DI/IR out is a great feature for me, so the VHX has become also my main source at home..
So as long as you do not fear to get lost in tweaking rather than playing - and you can afford it - I would definitely recommend it.