Mine (from which the curves were obtained) is the Walnut V2 which dispensed with the needless "screen" gimmick - If one loaded maybe 20 favorite concerts/albums the that could work quite well by sifting back and forth to recognizable beginnings. The volume pot is handy if there's somehing which happens to be much louder than a previous file.
There's a Zishan Z1 for those who don't like all that complexity (but assume cannot be operated blind as easily as one needs to rely upon an LED to show some function ststatus.
I think V3 may share a 10 band EQ featured in Zishan's V3 and T1.
I'm ey ing the T1 with dual AK4493 DAC (~$77) as is said to have a capacitance
screen vs the cheaper AK4490 DAC model (~$56) resistive touch screen.