It isn't as simple as that. There are numerous equivalent representations of the same underlying content (same data, same styling, same charts, etc) that have

It isn't as simple as that. There are numerous equivalent representations of the same underlying content (same data, same styling, same charts, etc) that have wildly different XML representations. You need a content-aware diffing tool. FWIW we've explored that idea in the past, using git textconv to diff spreadsheets https://www.npmjs.com/package/j#using-j-for-diffing-spreadsheet-files https://www.npmjs.com/package/j#using-j-for-diffing-spreadsh... -- it seems nice on paper, but quickly becomes hairy