Well… Ananda vs LCD-GX did a quick back to back via Phonitor XE front/back output switching, Bifrost2, and Qobuz for the audio source. I think I prefer the lows/mids of the LCD-GX along with staging and depth. Both are close in detail but I think the Ananda just has better detail retrieval. It has a wider sounding stage with airy highs. While the GX has a deeper stage and I had an easier time placing sounds on that stage vs the Ananda, which to me had a very shallow stage but wider, but the placement was a little off to me, felt like I was searching at times while listening.
Overall both are pretty dang close though… I think if you prefer airy/shimmer highs and not as much warmth in the lows the Ananda would be the choice. If you prefer smoother overall quality and a little more warmth then the GX would be the choice.
Fit wise … I think the Ananda is more comfortable…lighter and almost no clamp force. But the cups are massive and travel down to my neck which is off-putting. The GX is more traditional slightly heavier and more clamp force. Now the GX is very comfortable and I can wear it for hours, but in comparison to the Ananda, it isn’t as put it on and forget it’s there. Both are quite comfortable but Ananda wins it even with the odd cup size shape.
Also, the GX has a more “present” sound, intimate even. Engaging is another one that comes to mind, but, it isn’t an overly fatiguing engage, more of a warm hug of and engagement. Ananda is engaging as well but I wouldn’t say intimate, more of the lean forward and listen engage, also can get fatiguing with the presentation for me.
This is tough… I like both a lot actually… but if I had to pick one… I think I would have to go with the smoother GX. It also seems as if tonal wise the GX edges the Ananda out. But it is slight and might have more to do with the smoothness* of its presentation.
Another caveat, is the GX isn’t a bass heavy headphone by any means, but in comparison to the Ananda it has a bit more “slam” emphasis, not by much though. I also personally like the presentation of vocals on the GX over the Ananda. But, I prefer how instruments sound with the Ananda. This of course is all personal preference. If I didn’t have my HD800(SDR) I would probably grab the Ananda…but, as it is, I think I need to try more of these “fabled” other HiFiMan cans that some of you praise so much 
At the end of the day, both are actually more similar than different with only mild-medium differences in capabilities and sound profiles. These are both excellent headphones, and at their current price points I can easily recommend either of them, just need to know what your preference and use case for them are to narrow which is best for yourself…also I recommend if given the chance to listen to both for yourself, to form your own opinion.
*Smoothness: to me means there are no glaring issues to my ears such as sibilance, or treble spikes, bass bleed, etc … essentially something that doesn’t offend too much. It does not relate to FR graphs… I don’t overly care so much about them, mostly go off my ears… which are mine not yours so take as it is =)
edit: this is turning into a bigger thing than I intended when I started writing this post 
so I know it’s more open sounding then the Aeolus for sure, how much of a stage difference I guess is there between your other ZMF’s