I am confused :(

Hi. I have 8.1-RC2-p1 version on my system. 8.1-RC1 is newer or older version?
Yes. I know. Sounds silly question but I am confused. I cannot understand witch is the latest version to upgrade my system.
 
RC1 is the first Release Candidate, RC2 the second, so RC2 is the "newer", but since 8.1-RELEASE has been released since, you should consider updating your system to 8.1-RELEASE
 
RC stands for release candidate, so RC1 -> RC2 -> RELEASE. The freebsd-update command should be:
# freebsd-update -r 8.1-RELEASE upgrade.

Be sure you read the related handbook page, "24.2.3 Major and Minor Upgrades".
 
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