According to some random study, cat lovers are more intelligent than dog lovers. Theoretically, this has to do with how feline lovers are usually more introverted and open-minded.
Basically cat people are often more individualistic.
However, the study only looked at meager sample size of 600 students of the same University. Only 11% of which were actually cat lovers. Thus they only the IQ sample of roughly 66 individuals to represent the cat lovers.
If I had to pick between getting a cat or a dog, I would get a cat. I just don't have nearly enough time to take care of a dog.