First, I can only comment on recent Wilsons (post-Sabrina/Alexia 2), as those are the products I've had the most exposure to.
I'd say both speakers do transparency equally well. The thing is, for each manufacturer, "transparency" means a different thing. YGs are transparent to the recording, and because of the sealed bass arrangement, they'll present the recording truly as it is. Because of this, they are much more demanding on partnering amplifier, as if the amp is somehow deviating from neutrality, or adding/subtracting too much, you'll hear it.
Wilson's transparency lies in the "fool you", realistic portrayal of instruments in space. But they'll only show everything once 1) the positioning is right, 2) the drivers are properly aligned to the listening position. If 1) isn't right, the transparency will not be there, as the excess bass will obscure detail.
I think YGs are very lively, when paired right. Livelier than other sealed speaker designs that I've heard, for sure. But yeah, the jump factor on a Wilson is indeed higher. And that's part of what makes them more transparent to some, as they present instruments closer to how they sound like in space, due to the weightier presentation, and the temporal correctness. I mean, if you can't be fooled there's a tympani in the room, what's the point, right?
Even a modestly sized speaker like Sabrina can properly give you the weight and texture of orchestral instrumentals, and again, when positioned right, will have incredible resolution.
I can say that I used to have a clear favorite, and now, with these 3 products (Sabrina, Alexia 2 and Sasha DAW), I don't have a clear favorite anymore, and my choice will likely depend on the mood and what kind of music I'm listening to.
We used to have Avantgardes in the store, and that's usually what I'd go for, for my classic rock/prog rock fix. Don't need to anymore, as the Wilsons are amazing on that music, dynamic, punchy, rich when/where it needs to be, while not glossing over details at all. I'm just happy that I can switch back/forth between WA and YGs, as the mood strikes.
So, our approach is to present both lines as best as we can, present their virtues, and let folks decide which presentation they prefer. We don't use the terms or descriptions you've used, at least not generically like that. I try to know a little bit more about the room the speaker will be placed in, partnering gear, and listening habits, before I can even advise one way or another, as what can be, on paper, a positive aspect, when placed in the wrong room/setup, can actually become a problem.
