Office as a whole wipes the floor with LibreOffice. Cleaner interface, generally more stable, especially on Windows, Excel is and remains a powerhouse, etc. Word and PowerPoint are also very solid. Outlook is meh.
If anything, OnlyOffice is incredibly polished. I don't know how they did it but it seems to work better and have a much cleaner UI than LibreOffice even though it's much newer.
