I had assumed the V2 was less powerful due to it being a single piston, they look cheaper on first glance too. Might give the vented disc a miss though, I like the complete overkill, would look good cycling down the canal, just a bit pricey!
I saw a post on here last week, linked to a review, that suggested the new saint brakes aren’t very good if you need to adjust the levers for short fingers. I have short fingers, so that put me off.