So killing oneself is relative.
I never said that. I wish I knew where you really wanted to go with this. You are confusing me. As an attorney, I've been trained in how to differentiate specific acts of harm. If I have failed to do so to your satisfaction, I apologize, but I really don't know what you want me to say. As compared to suicide, giving one's life voluntarily out of necessity to save another is not a difference of degree but a difference of kind.
Suicide is intentional self-destruction without justification or excuse. It is self-murder. There is nothing about it that is noble. It is running away from something perceived as too difficult to bear. Ultimately, it is selfish. And no, it does not reflect the operation of a healthy mind.
Sacrifice of self for the good of another is an entirely different frame of mind. It is not grounded in fear but in courage and love. I am reminded of that Cuban mother who lost her life at sea trying to get her little boy to America. She would have lived if she could have found a way, but circumstances did not allow that, yet she took that risk on her son's behalf. I really don't see how you get "relative" out of that. Please enlighten me.