Sorry to step in but can give some impressions of just a couple different Daps.
I only have 3 others right now the HiBy R3, Echobox Explorer and Hiby R6 Pro.
The R3 is pretty much just a player but it can do Airplay so you can stream from your phone to it and doesn’t sound horrible and has a 2.5mm balanced output as well. The Explorer I just love the feel of it but it has been abandoned and has a bit of trouble streaming but still can and maybe sounds a bit better than the R3 but haven’t a/b’d them so probably not to far from each other.
The HiBy R6 Pro is a full Android Dap with good support and sounds very good with lots of power.
The QP1R is a no frills audio player that just does what it’s made to do and does it very very well. While it’s not ultra powerful to drive hard to drive over ears it does well with many more sensitive ones.
Can’t speak to all but with my Empire Ears Phantoms (10 ohm 117 dB ) it’s just a different story on the QP1R over the others.
While I did do a little shootout it was from my old iPhone 6S,Hiby R6 Pro and QP1R with Sublime “Wrong Way” with the QP1R having the original cd rip and others having 10th anniversary Edition remastered streamed. No surprise to me the QP1R was the winner. Just more space and separation to the sound not as a big difference but the same between the 6S and R6 Pro.