Well, since the H7 is a portable DAC/Amp it probably makes sense to compare it to other devices that are also portable DAC/Amps, right? Of these type of devices, I currently own and listen to:
Dethonray Honey H1, Chord Mojo 2, xDuoo XD05 Plus (w/Burson op amp upgrade), and a Fiio Q5S. In addition I have an L&P W2 dongle that would also fall into this category.
I own some DAPs too that I listen to. These include the A&K SP2000T, HiBy RS6, and HiBy R6 2020.
For reference I primarily listen at home in the early morning via Roon. I like portable gear as it allows me not to disturb other family members and to get up to get another cup of coffee without having to take off my iems or headphones.
The answer to your question (as it really pertains to the sound produced by all of these various portable devices) is there is no best, there is only different. Ultimately it all comes down to personal preferences and what sounds the best to you. Gear synergy can also make a difference as some iems and headphones sound better (to me) on one DAC/Amp vs. another. There again it’s just a matter of personal preference however. It’s kind of what the hobby/journey is all about.
Some head-fiers are really good at articulating the various differences that they hear in their gear and are able to put what they’ve experienced into writing. I unfortunately don’t have that skill. I chose to pick up an H7 because I seem to prefer AKM DAC chips over ESS Sabre chips and I liked the form factor of the H7. I’ll probably never use the bluetooth or micro SD card features but that’s okay. I will keep the H7 because even lower quality internet radio sounds good on it (to me). When whatever gear I’m listening to makes me forget about bits and sample rates, sibilance, etc. and just enjoy the music than it is the best and worth keeping in my collection.