Probably already pulled the trigger on these, but if you haven't yet, I say go for the demo in your favorite flavor. You won't regret any of the Maven B series. For anyone else looking for similar info:
I've got significant time behind the 11x B2's. Also own the 8x B3's and the two are the perfect combo. I had the 9x B2's before that set up, and had some time with the C1 8x. I have also looked through some B1's a little bit. All are very well built and the glass is amazing. Each line has their own niche, but I think Maven hit it out of the park with the B2's and the B3's.
Personally I use the 11x 90% of the time even when they're overkill. I use a tripod as much as I can, but they are not too much to use off hand. I swapped these for my original 9x because I wanted to see just a little further into the shadows, and I can say they meet that need perfectly. I live in and hunt big country, so the extra magnification was worth the hit to field of view, and depth of focus. I couldn't compare them side by side, but I assume the 9x would be better at twilight. That said, I've never been left wanting from the 11x. They are heavy, but being the same weight as the 9x, so for me it was one more for the pro column in the 11's. Once or twice I have wondered if the 9's would be better (mostly for field of view) but I wouldn't go back even if I didn't own the 8x B3.
If you want one bino to do it all the 9x is your huckleberry. Off hand, in the timber, on a tripod, you will have something that will perform great under any possible scenario.
The B3's kind of surprised me with how good they are. Clarity is outstanding. I did some side by sides with the 8x42 C1 at low light because I was curious how the better glass compared to the larger objective. They were negligible in timing for picking up detail first, but when the sun did get a little higher, the B3 was just in another class, unsurprisingly. For me their usability was the biggest sell. Dog walks, turkey hunting, fishing, or bowhunting elk, the B3's are amazing. They're so light light and compact, especially compared to the big B2, that you never leave them at home. They are nice off the tripod too but I don't use them that way often.
Lastly, I've had a few warranty claims into Maven (all my fault) and they have been incredibly helpful and easy to work with.