You can order Parcours with DT hubs
My GF and I both ride Aerocoach. She has the standard weight rear disc and I have the lightweight. Both run their 78 Zephyr up front. Nice wheels.
That’s a whole can of worms. IIRC it is mostly determined by the fork interaction, the tri spokes test better in isolation but slower when paired with a fork. It’s going to be very specific tho, depending on the fork/wheel/tire/frame interaction.
Looking at the specs, the cost difference for the lightweight is significant for not a lot of weight saving. Indeed the non lightweight seems to be almost the lightest disc out there. Is there any other significant benefit to the ultra? I know it’s a different hub, but does that offer any real advantage noting that in reality I’m not likely to be putting 10,000km on it.
Just an observation, the aerocoah is fairly narrow by modern standards at 18.8 internal. Not the biggest deal if your planning to run 25s, but if you want to run 28s (which I would recommend for comfort reasons) you may want a 21mm or even 23mm.
In the end, I bought the lightweight, well, because, I could.
For my GF I got her the standard.
I think they are fast wheels and light. But they are spoked with fairing. Many use them. I think my GF may stop racing and I may sell her set. She has a Zephyr rear also to match the front and a disc.
Pogacar uses it when he has the Enve sponsor. That alone is a huge endorsement.