I'm trying to decide between Munin and Cacti, they look fairly similar in most aspects. Has anyone got any good reasoning to choose one over the other?

It seems, from what I can google, that Cacti is easier to expand with scripts, and has zoomable graphs, which seems good!

Pro Cacti: http://seeknuance.com/2012/08/25/i-switched-from-cacti-to-munin/
(though not sure any of the features are applicable to me...)