Both types of braces have been designed for specific tooth correction situations. What this means is, depending on the severity of your teeth and which teeth are in need of straightening, one brace may be more suitable for you than another.
Typically speaking, if you have very crooked teeth and there is a need for your roots to be corrected as well, you may find that you will get the best results with a fixed brace, such as Damon. With modern advances in the dentistry field, it is now possible to have fixed braces (like Damon) that also have a clear option, so you get the best of both worlds with discrete treatment and an effective straightening method that corrects your main complaints.