I have the Bose QC 25s and the Sony WH-H900N headphones. I am not an ANC expert and it is subjective, but they're both great, but if I had to pick one, I'd say

I have the Bose QC 25s and the Sony WH-H900N headphones. I am not an ANC expert and it is subjective, but they're both great, but if I had to pick one, I'd say the Sonys edge it out for sound isolation and noise-cancelling. The QC 25s are nice, because they use a AAA battery, and not a sealed, lithium ion battery. So, with proper care, they should last a while and aren't obsoleted by a bad, sealed battery.