I have been a longtime avid user of BSD Unix for almost 17 years. I started my career with a small BSD-focused consultancy hacking away on Perl and Postgres. One of my first tasks was building a distributed, scalable network monitoring tool that could monitor very large network with thousands of endpoints. I use FreeBSD and OpenBSD at home and enjoy their elegance and simplicity.
I stumbled upon an article that compares the two operating systems along key technical dimensions. It is written in an interview style/ conversational format with a developer from each team, so it’s an easy read. Find the article here.