LibreOffice has had more development time (both features and bugs) than OpenOffice. OpenOffice was entirely dead for over a year and then Apache put the effort

LibreOffice has had more development time (both features and bugs) than OpenOffice. OpenOffice was entirely dead for over a year and then Apache put the effort into redeveloping features so they could be relicensed under the Apache license instead of the L/GPL. The one big addition to OpenOffice was the contribution of IBM's Lotus Symphony sidebar properties dialogs. LibreOffice 4.1.0 adds these as well but considers them 'experimental' as they are new and largely untested. LibreOffice has a larger and more active development team and can pull bug-fixes and features from OpenOffice as the L/GPL 3.0 is Apache compatible. OpenOffice can not pull features and bug fixes from LibreOffice unless they re-license as L/GPL. The projects are unlikely to merge. Every major Linux/Debian/BSD distro now ships with LibreOffice instead of OpenOffice. OpenOffice may still be more popular on Windows, though, due to name recognition. I don't know what the public numbers are in terms of downloads for the same period to compare.