I am not an audiophile. I have only owned the hd 599’s prior to these two cans. I haven’t seen enough reviews about the amiron homes so I want to give out my opinion. I will be comparing them using dekoni elite velours.

Comfort - amirons are slightly more comfortable because they’re lighter and less clampy but I’d say 5% comfier. I wear bigger glasses too

Looks - both look nice! I prefer dt 1990.

Accessories - I didn’t have stock dt 1990 cables because I bought them used and only had the coiled cable so I bought a replacement cable off Amazon. I prefer the dual headphone like the amirons. Only had the analytical pads from the dt 1990 but I use dekoni pads. Amirons have a nice carrying case unfortunately won’t bring them anywhere due to being open back and requiring an amp.

Sound

Treble - to my ears they are similar but the dt 1990 are brighter.

Mids - dt 1990 just have the liveliness to them that the amirons lack. Dt 1990 are more intimate regarding soundstage so it makes the vocals quite more enjoying. The males sounds the same maybe due to the midbass bump. The females are a different story maybe because the 1990s are brighter. Someone like sia and Adele just sounds more full and much more enjoyable. On the amirons they sound too far where their vocals cannot be truly represented.

Lows - amirons are more warm but the dt 1990 have more detail on the bass.

Soundstage - amirons are wider and the dt 1990 are rather more intimate. The amirons sound too wide where detail is lost.

Instrument separation - dt 1990 wins but maybe because everything seems closer due to the more intimate soundstage it is allowing me to hear it better?

Detail - amirons are close in detail compared to the 1990 but not close enough. I will choose 1990 every time maybe due to the more intimate soundstage just makes everything as I said earlier. Basically the amirons sound too far away to pick out all nuances

Overall the amirons sell for $150 bucks less average. Personally I would buy the dt 1990. They both have great build quality although the wires on the 1990 are concerning me. The amirons are wider and more warm and the dt1990 are the opposite being. A little more intimate with better mids and detail. I am going to buy the hd 600 after writing out the mids section lol. This was fun to write although it was a bit of a mess. I think my points were good enough