It seems Wiki is more updated, because at least in "upgrade" option shows a note like this: "Note that from F18 onward, upgrades are no longer supported in anaconda and should be done with FedUp, the Fedora update tool.", whereas in Install Guide this note doesn't exist. And there are more differences between these two places, so I'm confused about which of these is the right place to have the right reference.
Hi, I'm closing it as a duplicate. It is not actually one - this bug was obviously opened way earlier than the other one - but we're planning to review and mostly rewrite the whole chapter anyway, and this would be only a part of that task so it makes more sense to keep the other one open. Please see BZ#1136021. *** This bug has been marked as a duplicate of bug 1136021 ***