So, which one is better?
This question has no definitive answer. It is one of those questions that have open answers and no one can put an end to the debate that will be caused by such questions.
In my openion, I think no one is better than the other, generally speaking of course.
Each has it is own strength and weakness points. I will not go into details like licensing, commercial support or even community contributions. I will shade lights on the usability and functionality of a desktop operating system and a roboust web hosting server.
For the desktop market, Linux wins the competetion, this is due to the numerous hardware support that it makes it able to run almost every hardware, from VGA controllers to wireless network cards. It is really easy to configure a Linux machine to do all the daily computing needs including gaming if you want to.
As for the server environment, FreeBSD wins, hands down. It has decent level of security, very well integrated packaging system. Managing a FreeBSD server is much more fun and easier than managing Linux server, despite what Linux distribution you are talking about.
More on this topic in upcoming posts, sooner.