Is the same course offered in both regular and summer semesters, or are there fewer courses in the summer semester in Germany?

There are usually fewer courses offered in the summer semester in Germany compared to the regular (winter) semester. Not all courses available in winter are offered in summer.

Course catalogs for the summer semester are often published close to the semester start, and offerings can change each year. Availability depends on the university and program.

If you plan to start in the summer, check the specific university's course catalog for that semester to confirm which courses will be available.