Is Body Integrity Identity Disorder as genuine in your mind Gender Identity Disorder?

Without a second thought I always find myself being very sympathetic to those dealing with Gender Identity Disorder. My reaction is automically understanding and supportive of the choices a person might have to make in order to feel comfortable in their own skin.

Another board I frequent sometimes attracts people living with Body Integrity Identity Disorder and want to have a limb amputated or their spinal cord severed in order to feel “whole”. I must admit that I have very little patience for those with BIID.

Do you see the two as largely the same? Do you have the same amount of sympathy/understanding for those living with either? In your mind is one more valid or genuine than the other?