GZ had a guy sitting on his chest pounding his head into the pavement and then reaching for his gun openly saying that GZ would die that night.
If you believe that case is similar to this case you need your head examined. Seriously.
Why? The similarities are obvious to anyone. Zimmerman had called 911 to report Martin, Scott had called 911 to report Ables. Zimmerman says he was attacked by Martin. Scott says she beleived she was about to be attacked by Ables. Zimmerman feared for his safety. Scott feared for her safety. Both were legally carrying firearms. Both used their firearms within the guidelines of the laws of their state. Neither one should be prosecuted for doing what law says they were legally entitled to do.