The cat's thinking "You humans are easily amused"

Dogs have bigger brains. Cats have sharper senses.

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Bigger brains, but maybe only in proportion to body size. I'm not convinced that dogs are smarter. They seem to get hit by cars in equal number.

I've never seen a seeing eye cat
or a dope sniffing cat
or even a watch cat before.

Cat's can't really be trained to do certain types of tasks.

In fact, I don't believe you can really compare them - it's like they are two completely different types of species. (Ya, I said it!)

Both the cat and the dog are smarter than Jay Leno though.

This test was rigged!

Probably as a result of breeding those qualities into dogs. Cats were bred to be guardians in ancient Egypt. Just a matter of how we perceive value in an animal and then what we do to achieve those qualities. Train a wild dog and see the results.

"Big" Cats (Lions, Tigers) hunt by themselves, with a straight line-of-sight chase.

"Big" dogs (Wolves, Hyenas) hunt in packs, using communication and coordination.

Cooperation is a huge sign of intelligence.

Dogs have more sensitive senses of smell, hearing, taste, pain and temperature. Cats win in balance, sight, proprioception (I assume) and, of course, sense of entitlement.

A bigger brain doesn't necessarily mean smarter. Cats and dogs prove that.

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I've seen lionesses hunting in pairs, using coordination. And as for trained dogs, I don't think we should confuse compliance and subjugation with intelligence. I feel that a cat could work as a guide animal - but it's just not into that kind of thing. Cats are loving but unhelpful assholes.

Lions definitely hunt in packs, but lions are the exception to the rule that cats are not pack animals, i.e., maintain strong, complex social relationships. Asking which of cats and dogs is smarter depends a lot on what one means by "smarter". There is no question that dogs have a higher social intelligence. Cats are probably smarter in terms of visual discrimination tasks (mostly speculation on my part based on knowledge of cat and dog visual systems).

But if by smarter one means ability to learn, I don't think there is any question that dogs come out ahead. The socially driven desire to please alpha might make them more willing to learn, but it doesn't improve their ability to do so. I'm not aware of any research in which cats are shown to be capable of learning novel complex tasks - ones involving behaviors they haven't naturally evolved and require more "thought" than simple behavioral responses.