Sorry, I'll be more specific. I owned a Sennheiser HD 25 Adidas Original and HD 380 Pro. I will use those to compare. My DT-1350's aren't fully burned in, but yes, loving the sound, and expecting even more as they continue to be burned in. I love everything about them, I just prefer the feel of over-the-ear cans.
The DT-1350 is more reference than the HD-25 in its overall sound. It doesn't have the peaky low-treble frequencies, yet good treble extension. The bass extension is there, but again, more reference than the HD-25. The bass is good, yet not loose or boomy. However, the DT-1350 is not as reference as the 380 HD Pro's.
The 80 Ohm rating of the DT1350 works well with my setup so I was looking at the DT-770. I don't have a trust fund, LOL! However, price point is mainly a concern because at $300-ish, it leads me to think the DT-770 may be the over-the-ear version of a DT1350 that I am searching for.
The T1 looks good too of course, I just can't use that can to its full potential with my current setup. Cheers.