Is the RX superior in every way? Why is it cheaper with twice the RAM?
http://pcpartpicker.com/product/CpH48d/gigabyte-radeon-rx-480-8gb-video-card-gv-rx480d5-8gd-b
http://pcpartpicker.com/product/J2FXsY/gigabyte-video-card-gvn970wf3oc4gd
http://pcpartpicker.com/product/CpH48d/gigabyte-radeon-rx-480-8gb-video-card-gv-rx480d5-8gd-b
http://pcpartpicker.com/product/J2FXsY/gigabyte-video-card-gvn970wf3oc4gd