I use these headphones only via Bluetooth to an iPhone and an iMac in order to solve the tangle of cables and some mobility to win. From the sound quality I am very satisfied compared to the DT770. The comfort when wearing shorter (up to about 1 hour) is also very pleasant. Since I the headphones but mostly 4h straight in the office wearing falls on a fast that the ears to sweat under the cushion of the Sony start with what I could DT770 not notice under the same environmental conditions.