I have both Bose Noise Canceling Headphones 700 and the previous version Bose QuietComfort 35 II so I will base my judgment on it:
The Bose NC 700 both look more modern and have a better fit than the Bose QuietComfort 35 II!
In terms of music playback, the Bose NC 700 is a snap better than the Bose QuietComfort 35 II
The sound on call is significantly better in the Bose NC 700 than the Bose QuietComfort 35 II and, of course, also tremendously better against Sony's corresponding headphones, which I also tested earlier.
The app for the Bose NC 700 feels more modern and it works great for updating software, playing with noise reduction settings.
The battery life for me is perfectly acceptable, it could have been slightly better but as long as the headphones have USB Type C then there is no problem when running with the same charging cable as for the mobile. I cannot say that it is better or worse than the battery life of the Bose QuietComfort 35 II then I experience the almost the same.
One thing I miss, physical buttons! They are more clear to the Bose QuietComfort 35 II ... but that doesn't mean the touch control in the Bose NC 700 is bad, just that you feel better with the hardware buttons instead of the touch.
Headphones are highly recommended! Do you have today Bose QuietComfort 35 II so wait for the next generation (after Bose NC 700) to buy something then the differences are minimal between these two headphones, otherwise you have plenty of money, so fine, run on o buy them!