Yeah, completely different in both ability and character.
In character, Light's a pure megalomaniac drunk off his own 'awesomeness'. Lelouch is the opposite - his extreme methods are self-effacing, not self-inflating like Light.
And in ability? Light's not a planner, he's a fucking precognitive, there's no way to work those plans. Lelouch actually plans in the real world, has backup plan layered after backup plan, and even without knowing the future, bad luck fails time after time to screw him over.
In character, Light's a pure megalomaniac drunk off his own 'awesomeness'. Lelouch is the opposite - his extreme methods are self-effacing, not self-inflating like Light.
And in ability? Light's not a planner, he's a fucking precognitive, there's no way to work those plans. Lelouch actually plans in the real world, has backup plan layered after backup plan, and even without knowing the future, bad luck fails time after time to screw him over.