The six levels (A1, A2, B1, B2, C1, C2) include different amounts of teaching content, also known as ‘can-do statements’. This means that there is less teaching content at the first level, A1, than the second level, A2.
The type of course also plays a role here. Learning German as part of a two-week or three-week intensive course is a different experience to an evening course which lasts for 8 or 12 weeks. On online language courses, the course participants sometimes study independently on the learning platform. This also affects the number of teaching hours which are advertised.
You can find out more about the can-do statements
here.