Pixhawk 4 vs Durandal

Hello everyone.

Can anyone tell me what the preferred use cases will be for the Pixhawk 4 and the Durandal.

I have a 470 http://www.rctimer.com/?product-1141.html quad that I want to use to simply fly around and have some fpv fun, So question is. Durandal or the PX 4 and why?