When Vetta first came out, I took the amp to my warehouse with my Vox AC30, Bassman, Mesa Boogie Road King, 2 Twins and AB'd the sounds and response times of signal path.
I was blown away. Still am. Only amp i use now, sold everything off. Studio and live Engineers love it for it's flexibility and tone.
With the Variax, it is truly a brilliant combination.
robbiesteininger.com