Which AMP are you using for your Katana? If it is AMP2 or AMP3, do you hear any difference comparing it to AMP1?
I've pretty much exclusively been listening to my IT03 (with upgraded iBasso balanced cables) via the balanced out on AMP1.
I tried a big A/B test of Katana vs IT03 on both my DX200 (AMPs 1 & 2) and Shozy Alien+
I actually preferred the IT03 in 95% of the songs/configurations that I tried, and found that single-ended sounded superior on AMP2.
*However*, it's not quite a fair test, because:
My Katana only has the stock single ended cable, and they use 2 pin connectors, so I can't use the upgraded iBasso MMCX connector cable with them.
Similarly, the upgraded cable is 2.5mm balanced, so i can't plug it into AMP2 or the Alien+, and hence can only use the stock iBasso cable for these tests.
The good news (for me at least lol) is that I've ordered the 2.5mm balanced to 3.5mm single ended adapter mentioned previously, along with some quality MMCX to 2 pin adapters.
So I hope to repeat all the tests again in the next 2-3,weeks (as soon as they arrive)
Just realised I got overexcited and went off on a tangent, sorry for that lol
In answer to your question more specifically, I felt AMP2 offered a slightly richer, more detailed and dynamic sound compared with AMP1 single ended.
For the reasons specified above, I couldn't test AMP2 single ended vs AMP1 balanced, but I hope to remedy that soon.
I don't have AMP3, but I hope to remedy that soon too