I'd take Diaz over Hendricks in a fight.
I might take Diaz over Hendricks, but Hendricks has a much better skill set for facing GSP. Ben Henderson didnt magically come up with some brand new gameplan for dealing with the Diaz brothers style of fighting, it has been out their for years and it just so happens to play right into GSP's style. Diaz is going to get owned, this fight wont even be sort of competitive. Hendricks would at least be able to stop some of GSP's takedowns and he has one shot KO power.