Did a pretty intensive listening session tonight with H5, ifI Go Blu & Mojo, and iMac headphone jack (lol), all the time using Focal Utopia for listening.
I do prefer the H5 to the iMac headphone jack, the spatial presentation is slightly more involving and fuller sounding, it's not a huge difference but it's there.
Taking the fight to Mojo 2 which I wanted the H5 to replace ideally given it's sd card functionality, volume wheel and bluetooth, vs Mojo 2s utterly archaic and to me annoying design (volume orbs, really lol?) was a tad unfair. Long story short, the Mojo 2 sounds a lot better. Much better seperation, detail, it has a wow factor I actually forgot about...Vocals in particular sounded noticably different, much more natural, analogue and I daresay detailed on Mojo 2. How exactly I don't know, but it's the way I heard it, tried many tracks from Lana Del Rey/Aurora to confirm. I'll elaborate in my video review but as it stands for now Mojo 2 is quite a few classes above H5 in sound (as it should be, given the price and features on offer imo). Mojo 2 replacement still needed.
Then iFi Go blu. Wired in, both playing the same audio files, I've got to give the nod to the Go Blu. i just enjoyed it's presentation more. It felt more involving, the way it placed vocals in the mix I enjoyed more, vocals had any harshness smoothed out and again sounded more analogue and pleasing. I'll try some electronic music tomorrow to complete the comparison.
For now
Mojo 2 >>>> iFi Go Blu wired >> H5 Wired > iMac headphone jack> Go Blu bluetooth
Given the size of the H5 I am a tad disappointed. But it does have a lot of features so I'm sure some people will find a place for it. Even though I prefer the go blu some may prefer h5, but from a technical standpoint there isn't much in it between the untis, I doubt either measure particularly well from an objective standpoint, certainly not compared to Mojo 2. And with the price and size of iFi Go blu, I suspect most will just get that instead if they have the good fortune to try both before buying.