https://bugs.winehq.org/show_bug.cgi?id=46966
--- Comment #4 from Ulrich Gemkow ulrich.gemkow@ikr.uni-stuttgart.de --- Thanks for looking into this!
I confirm your observation for the 2018 version that with native gdiplus the screen preview in demo mode looks better.
Unfortunately I have thrown away the license key for the 2018 version so I cannot create the pdf anymore to check its quality.
I tried to check with the current (2022) version but this gives an exception soon after start and so I am currently unable to verify whether pdf creation with native gdiplus will work.