For FreeBSD, given that it fulfills the tasks required:

* Ease of management - more holistically designed.

* Rock solid parts that fits together - more holistically designed.

* ZFS, jails, bhyve, dtrace, ports.

* If it works today, it works tomorrow.

* A more approachable community (which AMD says is the reason why they are developing for FreeBSD before Linux now).

* Transparency and simplicity of how it works - if you can understand it, you can manage it and fix it.

* Documentation.

* Fun! Linux is not fun.