I replaced Zen One because I felt that Arya are being held back. If you think that a bit dull sounding DAC will make your $800 headphones sound better, well, think twice. The difference wasn't night and day - as much as DAC to DAC difference can be, so rather miniscule. But while still kinda on the warmer (or: more analogue) side, Aune Yuki delivered something more, and lost something less over Zen One. Yuki retrieved more, and still presented it in palatable way. Rather difficult to explain other than just saying that Zen One for sure limited Arya's potential.
BB "very warm sounding"? Noo. If you want warm sound, look at headphones first, then amplifiers. DACs don't change sound that much, and a tinge of warmth is all you can count on TBH. And from my experience with Zen Dac v2, Zen Can and Hip Dac 2, they put rather neutral amps in their dac/amps, so the "effect" isn't particularly deepened on amplifier's side. As a DAC + AMP package, I wouldn't call H5 specifically "warm sounding", but iFi Hip Dac 2, I would for sure call a bit blunt sounding and limiting, at least when you want to pair iFi's entry lvl stuff with some nice headphones with good sound signature, that Aryas for sure are. After all, it's still iFi's variation on standard offering, Zen Dac, dating back as far as 2020.
Even though I can't go back and compare Zen One / Hip Dac 2 / Yuki / H5 against each other, as I now only own the latter two, let me tell you this: when I bought H5, I kinda liked it more than Zen One + Topping A90 (neutral AMP). And while now Yuki for me has a better DAC than H5, slightly more natural and full sounding while maintaining all the detail, I still think H5 is much closer to it than Zen One. You can blind yourself thinking iFi offers you a "analogue" and "warm" sound, but in the end it's just a waste of headphones potential, while other things can offer just that what iFi promises and more. And that really slight "dullness" isn't enough to save bad recordings from sounding bad, anyway.
Shanling H5 being a complete package of functions make it so much more worth it, too. I rarely ever used Hip Dac 2 due to it's form, and now I use H5 with playback from SD card almost everyday. Choose album, leave phone on the desk, go somewhere else.
However, maybe Hip Dac 3 is better than it's predecessors. It's newer, with new functions and maybe it even presents sound differently. You would need to check on your own, as I lack experience on the newest iFi stuff.
PS. If you want to make your Aryas sound significantly warmer, just buy Chord Mojo 2 and look no further. You can pretty much EQ it to your liking using these colorful orbs.