I've been using Apache OpenOffice since it was made by Sun, but I've recently been made aware of a similar version of the same office suite called LibreOffice. It's made by the same people who originally made OpenOffice, but then were "eased out" when OO was bought out by Oracle and then abandoned and sold to Apache.
I've also come across another Office suite called "Kingsoft Office". Since it doesn't offer a database tool, it is smaller than any of the other Offices, which means it loads quicker. It also has all the usual features you'd expect from an word processor (spell check, ClipArt, tables etc.) though it lacks a thesaurus. However, it has some features that Word does not - such as moving paragraphs around with your mouse, opening multiple documents at once (under tabs), built-in conversion from document to PDF, and support for all the Microsoft Office formats - .docx, .xlsx and .pptx.
My question is this: Both KO and LO seems to be supported much better than OO. The also offer more options (such as font embedding), and supports more formats (including Microsoft's .docx/.xlsx/etc. formats). I think I would like to give either KO or LO a try, but do I have to uninstall OO first? Or can I run them both concurrently and see?
I know that running two anti-virus programs, or two anti-malware programs, concurrently is a Bad Idea(TM). Is it the same with office suites?