Well it has a Wunderlich sticker on it, so probably neither! But it's fitted with standard GS (non-Adventure) fixings. GS screen mounts are adjustable to three positions, Adventure ones are fixed position.
Looks like a Wunderlich Ergo or similar. I note that it is on the highest setting - try lowering it to the middle setting and see how that goes. Perversely, my screen (a Wunderlich Ergo) buffets like crazy on the top setting but is perfect on the middle. I'm only a couple of inches shy of yourself. Sometimes, full height is not always better.
Well it has a Wunderlich sticker on it, so probably neither! But it's fitted with standard GS (non-Adventure) fixings. GS screen mounts are adjustable to three positions, Adventure ones are fixed position.