Difference of pm-hibernate and systemctl hibernate

Question

I set up hibernation on my machine running 18.04. using systemctl hibernate mostly following this guide. Working fine - just as using pm-hibernate

What is the difference between those two?

Answer 1

A rather short answer to this would be that systemd is actively maintained, while pm-utils is not.

In fact, pm-utils has not been updated since 2010, so I would consider this software both ancient and obsolete.

It is advised to use systemctl from this point on.