I’m assuming you want more than “It’s not Linux and no systemd”? Yes that is just kidding.
Better is in the eye of the beholder.
For me, I’ve been a FreeBSD user for a long time as my home desktop (probably 3.3 or so). I went through Linux distributions early on in the “need specific version of Soundblaster card to use a CDROM”, went through a.out to ELF transition, RedHat from probably their first or second release, still use Linux at work.
So why BSD at home? It’s always felt more whole to me, not just a kernel and whatever applications someone decides they should tack on. It’s had some growing pains (4.x to 5.x with SMP changes was interesting), but overall I’ve had good stability with it for everything I use it for. email, web, photo editing, home brew pf firewall for home network. I’ve kept user data on a separate device from the OS and have migrated forwards without much effort.
That brought me over to TrueOS which I describe as FreeBSD12-CURRENT with a desktop installation. I’m getting newer hardware support (releases behind current I’ve played safe by not using latest gen hardware) which is important for laptops, plus the bonus of a ZFS based installation. ZFS (technically OpenZFS) by itself is a win, but “root on ZFS” is even better. System upgrade by creating a new boot environment, upgrade into the new one, boot it, if it has issues, roll back a boot environment and you’re back to where you started. Upgrades done right.
All online communities (user supported help) have their issues, but my experience with the BSDs folks are a little less antagonistic. Of course a lot depends on how one asks for help, but I’ve seen too many that kill participation at the outset.
Lots of smart folks in both camps, heck there are a few cross pollinators with commit bits (ALC is one that jumps out at me), just different ideas on doing things which is good overall.
License. I like the BSD license better; I understand the reasoning behind the iterations of GPL/LGPL, just not sure I completely agree with them. As a pure user they don’t matter, but if one writes software for a living, they do.
Executive summary: OpenZFS, better stability under my workloads on my hardware, feels like a more cohesive distribution, and lets face, a daemon is a better mascot then a penguin.
A little more about the technical side and the cross pollination. The current BSDs target different needs. OpenBSD security, FreeBSD more desktop/server, NetBSD “run on anything and everything”, DragonFlyBSD scaling and performance. The good ideas from each often cross over and provide inspiration for the others.
Stability: Linux is stable; what gets me is the upgrades that sometimes snowball and you wind up effectively upgrading everything. I like more control in what and why I upgrade.