"Show me just what Mohammed brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached." - Manuel II Palelologus
BSD is real Unix, Linux is a foreign clone that's been picked up in the US by IBM, which despite being a much bigger computer company hasn't had the same level of success. Mainly because the license is different, which allows Apple to keep parts of the O/S private, so their competitors can't use them in other products. Conversely anything that goes into Linux can instantly be used by competitors, hence the best features almost always get put into Linux last.