If you have noise sources in environment closed design headphone is definitely better.Currently torn between the DT770 Pro's and DT990 Pro's at the moment, thinking the DT770 Pro's for better outside sound isolation. Done a fair bit of research and ordered the G6 first before the headphones.
For example sounds of anything but the quietest mechanical keyboard leak easily through open headphones.
And while I haven't done direct comparison, DT770 certainly does very well for sound positioning in games for closed headphone.
I tested it with gaming recordings in shop couple years ago and I'm used to open headphones (including DT990) and tried Amiron Home just before it...
All DT770 versions have fixed cable.Appreciate the advice and will go with the DT770... is there a version with a detachable cable?
What differs is length/type of cable.
80 ohm version has 3m long straight cable.
And 250 ohm version has 3m coiled cable.
But Beyer's design is really simple and it wouldn't be hard to change broken cable, if you know from which end soldering iron is held from.
Or just mod headphone with cable connector.
Plenty of DT770/990 detachable cable mods.
https://www.youtube.com/watch?v=DtcbfdyHWvY