[icybox]

FreeBSD's PF has been forked long time ago and lives independent life now. FreeBSD have implemented SMP improvements, but this hasn't been taken back by OpenBSD that has moved on since ... there are some incompatibilities.

Both OpenBSD and FreeBSD are boringtech(tm). It just work, without all the drama, changing init systems and or system tools every couple years. It really depends on your workload, but with FreeBSD, you can run linux/windows/whatever in BHYVE or virtualbox if you need something specific ...

I've ran FreeBSD servers with ZFS and jails (bastille) before, but I usually fall back to OpenBSD (if storage <100G) or SmartOS (storage >100G -> ZFS). Really depends on the workload. Give it a shot or mention what you need.