Oh the difference is the same as comparing the stock amp of the Q5 to AM3D. They sound pretty much identical to me.
So to summarize, a slightly bigger more holographic stage, better control over the bass and a touch cleaner/neutral presentation. Not a big difference, noticable but not something that 'jumps' out of you.
The first thing I thought when I heard it was the more controlled bass. Well everything has a lot of control it's a very precise sound. It sounds very transparent so the recording sounds exactly like it's recorded.
The m11 and the stock amp for Q5 have a bit of warmth added. The nice thing is that the 3D even though it's more neutral it manages to sound natural if that makes sense. A drum strike sounds exactly like a real one does, a cymbal bloom is missing nothing and sounds totally accurate. It doesn't sound tinny or to soft or too metallic.
Sounds like I'm gushing again, lol it's not that m11 or am3e sound bad in any shape or form. But there is a touch of digital sheen and things don't sound as well controlled as 3D. Oh and almost forgot, with the slightly bigger more 3d stage effect of 3d (haha) the positioning seems to have a bit more space and accuracy as I said in my earlier post.
Imo of course
also I have nice slightly warmish or bassy iems and cans that I use. With something really treble centric, I might find 3d a bit fatiguing. Idk.
Tea time