Definitly much better than the Dacport
Dacport > HE-500 VS Dacmini > HE-500
Treble : There is some graininess on the Dacport, but very smooth, very liquid, and better decay on the Dacmini. The Dacmini is about striving for clarity and precision
Mids : Both Dacport and Dacmini have a liquid mids, but there is a gap in detail level that Dacmini crushes the Dacport. As i mentioned earlier, the Dacmini is about striving for clarity and precision, so the Dacmini can pick up more micro detail, also vocals are a bit forward on the Dacmini that gives more intimate feeling especially on women vocals.
Bass : Definitly the Dacmini improves the bass quality, the bass is more punchy, it's extend lower, it's faster (Better PRaT on Dacmini) compare to the Dacport
That's my opinion on my 5 hours old Dacmini
Sorry for my bad english hifimanrookie