I've been struggling with balanced vs single ended. It's hard to do a proper test.. and by the time you switch to single ended and plug in an adapter or whatever, is your memory even going to be reliable enough to remember the subtle differences?
I broke a connector on my balanced cable and am using my Anole vx from the unbalanced end and it doesn't feel like I'm missing anything at all.
I like the balanced end because it has a sturdier connection and I have right angled connectors on my cables so it's easier to keep them in my pocket without breaking something... But I can't say I've really heard a sound quality difference.. Especially with iems. Full headphones do sound better because they require more power.. But you can't even properly drive full headphones from the zx300, so this debate is kinda stupid