In terms of air-mass sensing, I found the Air Glide S to be on par with the ClearNav-Vario. The CNv was easier to install, but the wind calculation did not work well. I also found the Air Glide to be easier to use and of a much better quality of the hardware.

However, an old Zander ZS1 is still an excellent device for air-mass sensing. Wouldn't replace it with any of the two above unless I have to.