Not really related to the specific wheels above but in relation to rim widths, since 2010 I spent a lot of time experimenting with different tire widths on both pre 2015 Boras (~20mm wide) and the newer Boras with the 24.2mm wide rims. Before the newer rims came out I used 22mm Veloflex Carbons then 23mm Carbons that replaced the 22mm. Both fit the rim very well and I preferred the 23mm over the 22mm for sure, but mostly because of my weight being close to 200lbs. But even at that, the wheels were a little less stable than I'd prefer (and I'm not talking about stability in winds here, that's different). So I thought I'd try some 25mm Arenbergs. They don't fit the older rims as well as a 23mm but the added volume did stabilize the ride considerably. Perhaps this was simply because of the added damping effect between the road and the rim. Whatever it was, the wider tires did inspire a bit more confidence, especially at my weight. Also, I'm taller as well, which means a larger frame. Big guys, larger frames, and unstable wheels are a very bad combo. A gusty crosswind in a descent can set off a speed wobble much easier than for the small frames and little guys. And wheels are definitely a factor here.
So fastforward to 2015 and I get to test the same 25mm tires on the slightly wider rim. Again, a noticeable improvement in stability (not wind related) over the pre-2015 rims. But as was mentioned above, I also feel compelled to use something larger than a 23mm tubular on these rims. They just fit better. As they should, since that's what they were designed for in the first place. But it also makes inherent sense to me that a rim with a greater width is going to be more stable than a narrower one. And it is. I'm going to try 24mm tires next as I think for me that is a sweet spot in tubular tire size.
Now as to the stability in crosswinds etc. I guess this does come down a lot to the aero properties of the rims. And yes, testing the pre-2015 boras with 25mm Arrebgergs against the newer rims with the same tires, I'd say there is also a noticeable improvement in handling the crosswinds although whether that's due to a slightly more aero profile or just simply because they are a bit wider I do not know.
I do know this, from actual experience. As much as some people salivate over Lightweights, I have not experienced any worse handling wheel in a gusty descent. It's scary. Caveat being I was on the generation before they lowered the profile to, what is it now, 47mm?, or 46? Anyway, they are so flat and so are the spokes that they catch wind like an America's Cup catamaran or whatever they're using these days. I have also read and I wish I could remember where for reference, that for all out speed into a 0 yaw wind, that the straight V profile is the fastest. And I kind of feel that maybe true. Trouble is, how often are you riding into a zero yaw wind.