I have done just some Audio tests on the kdmas(my 5k+ is having some issues with pitool; may move it to the 8k).
@neelrocker might be right with something with the Vision headset not mixing right with Kdmas speakers or he might need to also try the y cable.
Without the Cups the sound is okay; likely better than SMAS. However as we know it doesn’t isolate.
With Cups the sound is minimally on par with DAS maybe better. Need to do some A B Testing.
However if you have a narrow head the kdmas with or without cups is not likely going to be a great experience as there is very little adjustments to press against the ear. Only a bit of rotating at top of audio hinge.
Which brings me to the comfort kit. Even with the large foam the eye glasses cutouts leaks light! So folks like @asampal is definitely going to have issues with this. This facial interface seems to be made for pretty wide heads. Some foam should fix it. Haven’t tested visuals yet.