I have used the Diver (v1) and the Sophia. I will say that I'll take a Sophia any day of the week and twice on Sunday.
The Sophia rebuilds easy (for it's size). It allows full
juice control from closed, 1/4 turns, 4 turns, and anything in between. It's adjustability is bar none, IMO, the best. Quality build and
threading is spot on. Billy handles his customer service and customers with the utmost respect. Sophia and my SnP - a marriage made in heaven.
Disclaimer: I do not know enough about latest versions of the Diver and am not speaking against the maker at all. I'm just basing on MY personal experience. Jojo I'm sure will have her opinion. We have over 15 Sophias to rotate through. It's no accident.