Polaris Vs Pascal

I'm not looking to start a AMD vs Nvidia pissing match..

I know we have very little info on both, but both seem very promising with that being said.

I currently have a Asus AMD 380X 4GB oc'ed edition (to the max) it's been good, but I might be looking to upgrade again once these new cards release.

Should I stick with AMD and maybe crossfire both cards

(380X and what ever new card that's in the same "class" as this 380X.)

OR get rid of the 380X jump ship and grab a Nvidia 1070 when...

Polaris Vs Pascal