Use the expansion diff tool to compare the expanded artifacts of 2 different expansionSettings. You can use this to see the changes between expander versions or when adding options.
Download the jar:
mvn dependency:copy "-Dartifact=net.democritus.tools:expansion-diff-tool:1.0.0:jar:jar-with-dependencies" "-DoutputDirectory=."
Run expansion-diff with:
java -jar expansion-diff-tool-1.0.0-jar-with-dependencies.jar