It has regular intuitive moodle-like interface, and gives clear distinction between those two areas.
One thing that we can possibly discuss: making navigation methods the same.
Settings has 4 sections, but no sub-tabs: General settings, Grade item settings, Overview report, User report
(which I personally like more for this particular area because of less clicking)
My preferences has 2 sub-tabs and each sub-tab has sections:
Grader report with General, Show/hide toggles, Special rows
Visual Report with Calculations
I would probably make My preferences with no sub-tabs and just have 4 (or more as needed) sections there:
Grader report - General settings
Grader report - Show/hide toggles
Grader report - Special rows
Visual Report - Calculations