Yes, there is more to Linux than Ubuntu. As you are probably aware, there are many different types of Linux to choose from, even though not all get the attention they deserve.
For the purpose of comparison, we personally tested each distro and critiqued it based on several distinct areas: appearance, ease of use, system administration, software/package management, security, and the level of support available for the distro. We graded each factor on a scale of zero to five: 0 – Abysmal or non-existent; 1– Very bad; 2 – Needs improvement; 3 – Average; 4 – Good; and 5 – Excellent. We hope that this guide will give you a better understanding of the current state of Linux, so you can make an informed decision about choosing the right Distro without just defaulting to Ubuntu (which we've included in this roundup).
http://www.linuxlinks.com/portal/news/article.php?story=20090507132937374