Have them both, except my DT 770's are the 80-ohm version. Perhaps my large head is an anomaly I don’t have issues with my HD280’s as far as comfort goes. I will say this; the 770’s are probably the most comfortable headphones that I have worn for long sessions, between 3-6 hours at a time. Something about the velour pads just makes them nice and inviting whenever I am thinking of which can to put on. No over-clamping issues with either for me. I used to be in radio and still do voice over work professionally, because of this I have a preference for closed cans, so they both serve that purpose well. I do that on my free time and during the week I teach high school media tech, where sound design and video editing are my class preps. I use both sets of cans and a few others from time to time, but I love the 770’s and 280’s for different reasons. Both great closed cans that work for what I need. Happy listening!