Make Tech Easier published a comparison between SELinux and AppArmor.

SELinux vs AppArmor: What Are the Differences and Which One Should You Use?

SELinux (short for Security Enhanced Linux) is a Linux kernel security module that is used to increase security in Linux distributions by hardening access to files and processes. Another similar Linux kernel security module that is used for this purpose is AppArmor. There is a lot of interest in these two modules because of their overlapping roles in access control for Linux operating systems. As such, this article covers the differences between SELinux and AppArmor. 

SELinux vs AppArmor: What Are the Differences and Which One Should You Use?