I think the Sony's actually do a little better job of blocking out the noise than the Bose do. I own a pair of the older QC15 headphones and bought the QC35's to replace them. After reading so many positive reviews about the Sony's I bought those and after two weeks took the Bose back. The main reason for me was the audio quality was better. I bought the $150 Sony Walkman to take advantage of the Sony LDAC technology and it is very good. I have purchased quite a few albums in 192/24, 96/24 and DSD and playing them on the Walkman listening wirelessly through the MDR1000X my ears are very happy!
For Noise cancelling the Sony, to my ears, has a slight advantage - so that combined with audio quality won me over.