There was a big difference in sleep quality for humans, dogs, and cats when it comes to sleeping partners in bed. People who slept alongside dogs showed to have the best quality of sleep of the 3.
“Compared with human bed partners, dogs who slept in the owner’s bed were perceived to disturb sleep less and were associated with stronger feelings of comfort and security. “
The study goes on to explain what it found about having a cat as your sleeping companion.