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.