Certain cases are definitely easier to win than others. If you are statutorily blind, you are automatically disabled. If you have ALS, it is likely that you will be awarded benefits right away. Psychiatric cases are generally harder to win than others because many psychiatric patients fight the process or they don't see their doctors regularly or stay in treatment. It is very hard to win a pain case where someone alleges a great deal of time and there is no readily determinable injury. For that reason, people who have fibromyalgia and chronic fatigue disorders have trouble winning cases.