GSP will outstrike Hendricks terribly. I don't think Hendricks stand up is anything special. But he has insane power and speed. I think GSP will be okay though. He is much more intelligent and technical. He will use awesome angles and confuse Johny with all his weapons.
"He came, he saw, and if he didn't entirely conquer - he came as close as anybody we are likely to see in the lifetime of this doomed generation."
- Hunter S. Thompson on Muhammad Ali