Both are good top-three hospitals. Coal Hospital belongs to the teaching hospital of Hebei United University. It has complete equipment for students to practice. There are many interns who graduated from the school. If you are doing an internship, this is a good choice. Workers' Hospital is a large comprehensive hospital, and the doctors inside are all selected top experts.
So if you are going to see a doctor, this is the right place, but interns will not teach you skills easily