Let's take a look at the differences in Front page administration.
This expands to:
Selecting Permissions takes us to a screen where we can see which roles have which capabilities on the front page. To remove a capability from them we just have to click on the X next to a role. To prohibit fully, a more drastic measure, we click the + under Prohibit. In the following screenshot, if users are given a Manager role on the front page, we can prevent them viewing live logs.
We can see the following differences:
Roles have been rationalized: There is no need for administrators, guests, or Course Creators to have a front page role, so Moodle 2.0 doesn't list them
A new role, Manager, is available, in response to popular requests for a non-visible course administrative assistant...