Gentoo. Gentil is the rapid distribution of the world Linux, its speed, he takes the philosophy. A philosophy is that Gentoo is going from the original files are programs that are specially optimized it by your hardware and your needs, it is clear new technology. In Gentoo has its own system Portages (portezhey), an improved control system software than the existing system. Portages system more flexible and allows you to successfully use it to address your specific goals, regardless of the goals. And the basic principle of distribution is a technology that allows the user to do with the system anything, without any restrictions. Ie Gentoo philosophy is to develop the correct software: the utility serves only its duties fully, it will not prevent you, do not try to interact with you, you can forget about its presence. Of course, the assembly could take up to a week of time on the old computers and speed up system, but all his speed, it shows the new hardware, which has already introduced a new software features directly into the chips. This allows the system to beat records and to increase the speed from 20 to 200%. Also, you get a wealth of experience and knowledge in a Linux system when you install the OS and can be proud to consider themselves professional in Linux. Ubuntu. Ubuntu is convenient and it is a fact - the most convenient installation system, and packages (programs), too. There are convenient LiveCD / DVD with a graphical installer in multiple languages, which look at the system without installing the hard drive. Installing using this installer is very simple, understandable through dialog windows and the Russian language. Ubuntu developers have made only one installation CD drive, everything else is available on the network if necessary. If something is not enough, the system itself offers to download and install the appropriate software. You need only click "accept" or not. One big plus is a great recognition of iron, which scatter the myth that few drivers for Linux. The system more suitable for those who want to work in the system. The computer configuration average basic Ubuntu installation is done in less than half an hour. Incidentally, while leaving the new release, it is not necessary to reinstall the entire system, but rather to update your version to the next via the Internet when you do want. Ubuntu is free software, ie available free of charge, unlike many other commercial distributions of Linux: Xandros, Mandriva, SuSE, Red Hat. Let's summarize: Of course, it is difficult to compare the fastest and most convenient system. The choice should make everyone very, taking into account their needs, time and skill.