Unfortunately I’ve never heard the 250 ohm variant myself, so this is a valid point when comparing signatures. The 80ohm version was always a bit U-shaped to me. Yet shouty/hard still seems rather harsh as a characterization… these are just words that never came to my mind when hearing the DT700.
The K371 I‘d also describe as having a slight tendency for shoutiness, but I’ve not heard the DT900 — so that’s another valid point to mention.
I do know the 990 though, which was not my cup of tea.
To both of you: I hope my comment did not come across as criticizing your taste. It was just words that did not come to my mind, but that of course implies a family signature between DT700 and DT900 which may not be there.
While I’m not much into open headphones I think I’ll just try to give the DT900 a listen
with the DT700 I’m very happy I have to say. That may well have to do with Harman Target catering to my needs as a lover of modern/electronic music such as EDM and Deep House, where space is virtual anyway and therefore not that important to me…