These were printed on my Ender 3 with Klipper firmware. In the second picture, the 3rd one is the best quality IMO and was printed with the following settings:
Standard Quality (0.2)
Min Layer Time: 5 seconds
Max accell, 3000
Pressure advance, 1.05 (still have stock boden)
The last cube was with Pressure Advance set to 1.5. That's too high as you can see from the back corner in the first picture.
(I wanted the pictures in reverse order, but Thingiverse is not persisting that change.)