Your timesheet is the place to view all time logged in a certain period. It combines data from multiple boards, workspaces, item and subitems in the same instance ( Timesheets can be accessed from the Tracket board view and a workspace app.
Your Tracket data will be the same within your instance. No matter to which board or workspace you add Tracket, as long as it is in the same instance, your data and Tracket settings will be the same.