Sony's earlier WH-1000XM3 model was great. But if it had a weakness, that was its voice-calling capabilities, particularly in noisier environments. The new WH-1000XM4 improves in that area and also adds multipoint Bluetooth pairing so you can connect to two devices -- such as your phone and PC -- at the same time. That means that if a call comes in while you're using the headphones with your computer, the audio will switch to your phone when you answer the call.
The Bose Noise Cancelling Headphones 700 probably still have a slight edge for voice calls, but the 1000XM4 headphones are arguably a tad more comfortable and also have some other slight improvements to noise cancellation and sound that make this model a great all-around choice.