Dogs have communication hands down. I've seen many dogs understand numerous commands and engage with humans well (we don't have bomb-sniffing cats).

On the other hands, I think dogs lack more "frontal" intelligence. The type of top-down intelligence that involves planning, top-down control. Perfect illustration: one of my stupid dogs trying to get to a squeaky toy with a fairly see-through blanket would try running through a blanket barrier to get to a squeaky toy. This was non-stop aggressive behavior lasting for many minutes with no top-down consideration. This would even continue if there was an opening in the blanket.

Wrong. A earlier study in 2006 used fMRI. This study used a simple classical conditioning test where they played a tune before blowing in the patients eyelid.