Cats are generally known to be easier, dogs are a very big responsibility. Cats are usually a lot more independent, once toilet trained they don't need cleaned up after and they roam free so don't need walked. They are usually cleaner, don't droll or leave odour. They can can cause a lot more damage in your home than cats, cats scratch sofa's but dogs shred things. I'd say cats are easier and better, they are very playful, they like playing catch with anything. Only thing about both is be prepared to pay expensive vet bills, but I believe dogs are more expensive. I've had my cat for 10 years and and found him easier than the rabbit I had.