So i wrote this in the GSX 1000 thread, but here you go
So i have three different headphones/headsets to compare that I currently own. The Philips Fidelio X2HR, the Sennheiser Game One's, and the BeyerDynamics DT 770. The first two are open, the last closed.
Both the Phillips and Sennheisers have a much wider and open soundstage, I've been using open back headphones for so long I had forgotten how closed in a set of closed ones like the DT 770's feel, and that is a closed back headset with what is considered a good soundstage for a closed back set.
I've tested the Philips over the last couple of weeks but was comparing them to my memory of the Sennheisers i switched from, and the DT770 I was using a long time ago. So in order to refresh my memory I utilised a few tools to test them out:
First is the Rein practice mode in the Overwatch workshop:
Basically i stood still and with a Reinhardt spawning anywhere in 360 degrees around me, have to turn as soon as i hear his ultimate voice line to where I think he is according to the sound cue coming from the headphones. Tried this with all three, they are all very good for imaging and positioning of where the sound is coming from which means the GSX 1000 is giving them good information which they are reproducing accurately. I'd say it was not as clear with the DT 770 but i don't think i was any better with the others, it was more that I knew more consciously where to turn with the open back sets whereas it was more unconscious decision making with the closed back set.
The soundstage is way more open with the Fidelio and Game One's compared to the DT770.
I then used this virtual barber shop with all three:
For this I turned off 7.1 processing in the GSX 1000 and went to straight 2.0. Each headphone accurately reflected the sound and where it was coming from but it was clearer with both the Fidelio and Game One's. In my opinion the Fidelio has a wider soundstage than the Game One's. However, the Fidelio X2HR is noticeably bassier than the Game One's and even the DT770's. The bass is powerful and rich, noticeably more weighted and stronger than the Game One's. It took some getting used to and I think possibly reduces some ability to pick out details in the high end like footsteps. The Game One's are much more neutral.
On a comfort basis, the Fidelio's are comfortable but are significantly heavier than both the other pairs. The Sennheiser Game One's are the lightest, easily, even with the DT 770 without a mic, followed by the DT 770 and then the hefty Fidelio X2HR.
That being said they are all comfortable, I'd say the Sennheisers are most comfortable and being open don't heat up your ears as much as the DT770's do or any closed back set. The Fidelio's I think are a little warmer than the Sennheisers and are heavier, but still comfortable to wear.