FWIW: Org-mode overloads C-c C-c and tab to the point where just using those two keys you can perform a huge portion of the Org-mode actions depending on your context (including executing code blocks).
I seem to remember that there are many, many keyboard shortcuts unique to org mode.
I distinctly recall shortcuts unique to org mode for moving a subtree up and down relative to a list of subtrees all at the same nesting level -- an operation done by dragging with the mouse in many or most other outliners. I know the dragging interface is harder to implement, but I find it more ergonomic.
