For an "average user" Linux, and FreeBSD are absolutely identical. If it's supplied with pre-installed GUI (say Ubuntu as Linux, and TrueOS on BSD side) it's more or less the same point-and-click experience. If it's bare console - well, it would be the same OMG-what's-that experience. Differences will start to appear for a user who wants to dive deeper, but that would make him/her non-average apparently.

If you're using a GUI, they're largely the same, with a slight edge to one or the other depending on your use case. For example, X on TrueOS plays more nicely out of the box with VirtualBox than almost any Linux distro I've tried.

If you're using the command line, FreeBSD has far better and far more consistent documentation.