I executed

$ java -jar tools-java-1.1.0-jar-with-dependencies.jar CompareDocs compareOutput.xlsx ../testResources/SPDXJSONExample-v2.2.spdx.json ../testResources/SPDXJSONExample-v2.3.spdx.json

The resulting spreadsheet shows quite a few diffs even though the corresponding properties are identical. Not sure what the most efficient way of showing that is, so I'll attach two screenshots