What is the difference between a gopher and a groundhog?

Difference between Groundhog and Gopher, Groundhog are larger and live above ground and Gopher is smaller and lives underground.

From: https://a-z-animals.com/animals/comparison/groundhog-vs-gopher-5-key-differences/
"Groundhog vs Gopher: 5 Key Differences - A-Z Animals
Gophers and groundhogs are both rodents that dig burrows, but they belong to different families and have distinct characteristics. Groundhogs are larger, stockier, and more likely to be seen above ground, while gophers are smaller, more secretive, and primarily live underground. Additionally, groundhogs hibernate in winter, whereas gophers do not."