All meats are harder to digest than other foods however chicken is the easiest to digest when it comes to chicken or beef.
The beef would be the meat that is harder to digest than chicken and then after that would be pork which would be harder to digest than beef would for some people.
Meats such as hot dogs, chicken and sausage or even bacon tend to digest in your stomach faster than beef or other harder cuts of meat.
But even then the meat including the beef should only take at most 72 hours to fully digest in your stomach and leave your body through your intestines.