At first, I tried 770 pro x. Same drivers, different tuning and housing.
After 4 days of testing, for me- the treble was too harsh and after trying to play with eq, paper mod and audio interface I still couldn't listen to them for more than 1 hour. Just didn't suit me, but overall comfort was great and better than 700 pro x, that's the only minus for me, for now.
Sound, more premium feeling, design, earpads and second cable- all of these are big pro's for 700.
Overall- really enjoying these. EQ'd them for my taste, added some lows and got a feeling- that is exactly what I was looking for.
If you are sensible to treble and deciding between the two- get these asap.
Thankfully, Thomann provided me an excellent service and quick return of 770 and new shipment of 700. Amazing work.
tldr: Pretty good headset for what it is and a price tag, clamping force on my head will get looser and then they will be 10/10