I use single ended with Andromeda S and had a brief listen with balanced out of SP1000M. I find that there is less hiss out of single ended, however there is some interference noise for a second when skipping track or when track is buffering on Tidal. I've tried on 2 SP1000Ms and two sets of Andromeda, green and stainless, same thing.
The inference is not there with balanced, but the noise floor is a bit higher than using single ended.
I'm wondering if there are certain balanced cables that can reduce the hiss without impacting the signature. Not too interested in using an IEM match.