The 700 model is in my opinion a QC35 II wrapped up in a pretty package with more microphones put in and a artificially high price tag to be exclusive. I recomm

The 700 model is in my opinion a QC35 II wrapped up in a pretty package with more microphones put in and a artificially high price tag to be exclusive. I recommend you pull up the the product pages for both and compare side by side. Sony put their efforts into producing custom chips that could upscale low res audio, they created the LDAC codec, put in chips that can detect your environment and adjust ANC accordingly, they have airplane pressure neutralization. Mind you this is all a year before the 700s came out and can be found for half the price of the 700s. They've also come out with numerous other ANC headphones since then at lower price points. Bose may look prettier to some, but Sony is probably 4 years ahead of the game in terms of features, cost at scale, and product offerings in the space.