Yup, you're correct, makes me wonder if any of them would be open for consolation. I tried to request one on my instance, as it's been dead for the last 2 years.

It is subtly different - generally enough to by annoying, but not actually significant (it is annoying to use zfs on linux but not really hard). There are sometimes advantages and disadvantages, but they are often obscure things that probably won't matter to you (just like many people didn't notice the switch from X to Wayland, or whatever init to systemd - in the end things are annoyingly different but it isn't significant). Even where I can list something, in a few years there will be a new version and that would have changed.

The one consistent difference is BSD is a system which means tools like ifconfig are built in thus still works the way they did in 1995 - linux has gone through several iterations of replacement because they needed something that wasn't in the default tool. OTOH, if you need one of those new features that caused linux to change in the first place you have to read the manual page either way as it will be a new option. Again, this is annoying, but not significant.

there are several tools which have different options in BSD vs GNU (though you don't have to use the GNU versions on linux). Again, annoying.

You can read about it on the FreeBSD website — https://freebsdfoundation.org/freebsd-project/what-is-freebsd/

Over Linux I assume? It has some unique stuff, like ZFC completely integrated. There's monolithic approach, Linux is just a kernel with a lot of distros, while with bsd kernel, userland and utilities are developed together. Some people say that is also more simple and logical than Linux. In my opinion both are good, it just depends on your use case.

Also most of ppl who use BSD use Linux too from my experience.

Lower user pool leads to better security but the biggest security risk on any platform is the user.