Yes, German Shepherds can bite harder then pitbulls. That's why they make such efficient cop dogs. Nat Geo tested the bite force of a pit, Rott, and GSD, and the German Shepherd came out as having more PSI then the Pit Bull.
Five police dogs recently graduated from the Union County Sheriff’s Office K-9 Training Academy in New Jersey. The K-9 unit has grown from only one dog 20 years ago to ten dogs today. Here’s more about the proud graduates from nj.com: