As a past Vmax owner, I don't place the two bikes in the same class. The Vmax is probably the ultimate for riders who want the absolute strongest, quickest, tire shredding ridiculous power bike but don't cater to egg bikes whereas the Valk is much more a cruise in all aspects. I'd also argue the Vmax is better suited to extreme riders with corresponding skills. I'm really not that rider even though I thought I was at a younger age..
I never cared to ride the Vmax 2?up much or to run more than 70 or 80 miles at a stretch. No one ever outran me, and I got more attention on the Vmax than anything else I've ever owned. I was constantly challenged by other bikes, to the point I started ignoring most. The Vmax makes you a rock star in some circles. If that's what you are into.
All that said, I prefer the Valk in so many ways. To start with, might seem like a little thing, but I like to sit flat footed on my bike. I love the comfortable 2?up riding. I like 240 miles on a tank. The Valk runs smooth, quiet, handles great, has power to run with literally any bike on the road. Perfect in curves, especially at the moderate speeds I generally run. I get more attention than I desire (although much less than on the Yamaha) but it is surprising how few riders are familiar with the Valk on sight. Overall, the Valk is nearly a perfect match to my style/ needs.