Ubuntu LTS versions receive 5 years of support. Occasionally, new point-releases are made for LTS versions. For example, Ubuntu 14.04.1 LTS was released on July 24 2014, which replaces 14.04.
How long are security updates provided for the original 14.04 release (or other LTS versions)? The Ubuntu wiki has no end of life date defined for 14.04.
Edit: This answer explains that point-releases are just snapshots of the bug fixes released so far, thus all versions receive the same duration of support.
apt-get update; apt-get upgrade
, you'll end up with the same packages for Apache in both. – muru Dec 23 '14 at 06:33