Didn't downvote. But if you don't know the difference, then you seemed pretty confident in describing their differences.
BSDs are an actual fork of UNIX from the 90s. Linux is a kernel whose code is not forked from UNIX. The userland is most often GNU, which stands for GNU's Not Unix.
That's not an architectural difference though. The way that the systems are technically structured seems very, very similar to me. There are quality differences (BSD generally better) and feature and performance differences (Linux generally better), but not basic approach differences - is that wrong?
