I understand what you say, but:
- diffoscope on F-Droid seems to be broken (see earlier)
- diffoscope crashed on my device
- There was no result on diffoscope.org because it took to long
- I have no suitable hardware to install an F-Droid build environment
IMHO it should just work if the build environments are aligned. I will make the necessary changes in the gradle scripts, but I need to know what to change.
tl;dr; I can’t do this alone.