Its a ton heavier, because you need a full LibreOffice install effectively, but it does a lot more than Apache POI, so it depends on whether your use-case warrants the extra features.
I've used this functionality to automate running Python scripts to update speadsheets using Libreoffice Calc in a container so non-devs can have their cake and eat it.
Thanks! I've had a little look at this, but it seems so inside-out to me. I'd just like to run commands to make a spreadsheet, add sheet, add content to cell in sheet, that sort of thing. I might take another look though if you got it to work.
