Alot of talk about lenses but not the display.
If you do a lot of night flying the Vive/Vive Pro win hands down (OLED Display) much deeper blacks and richer color over the others such as the Cosmos with the LCD.
Flying with LCD at night everything is grey very poor quality.
I have both the original Vive (probably 1000 hours of flying on it) and the Cosmos. The Cosmos is a piece of junk that should have never been released - uncomfortable, poor lense sweet spot, very poor tracking, full off light leaks.
Just look at the type of display the $6-10K professional headsets are using.