LibreOffice is a fork of OpenOffice and is not any more up-to-date. Both are
being developed, now separately. There is not much difference other than
branding at this point, but the differences will become more pronounced
through time. OpenOffice is still controlled by Oracle and LibreOffice is
not. Many distros including Ubuntu have embraced LibreOffice over
OpenOffice, but it has more to do with politics than features at this point.