Vertical lithophanes printing quality - sharpness

I am printing vertical lithophanes. I bought BL printer to do this better, but unfortunately I found out that the quality (sharpness) of the lithophanes is worse than with my old setup of Cura and cheap printer.
Is anybody also printing vertical lithophanes and managed to get as good or better sharpness?
It seems that the edges on the wall are rounded/softened and sharpness/detail is lost in comparison to older 3D printer.
I did the PA calibration and I saw the difference, but the result is not satisfactory. Therefore I am looking how to use Cura g-code to print on BL.
Seems to be related issue as described in What settings to prevent small details & edges from being rounded?
Thanks for advice.