Personally I thought it this way:
Rider talks about leadership by example, and by clear example, such was his brand of leadership and he would crack heads to get to the top. Think of his as Branson-like empire. His is big, and talks big, and thinks big. His is a forward company, a fetching piece of the stock market that everyone wants to buy, and he shows people what reason should they buy into HIS idea. I think in a way, his would be the sort that says if there are weaklings in your army, you don't abandon them, but you make them die in your battlefield, you step on their dead bodies and you proceed, and smash the enemies with your sheer will. (that does seem pretty Roman to be honest)
Saber was talking about an apologetic type of leadership, the sort that 'if I did this, I would have compensated for that' in a way, many corporations today perform this sort of leadership because as the business environment becomes ever tougher, you have to take parts that compensate other parts, you become what you are, and when you fail, there is much there needed to 'regret' and 'redo' which was what essentially Saber said. (in hindsight, companies tend to 'redo' by firing perhaps the previous CEO, or changing structure etc, do they always regret? that is debatable...think Olympus's latest scandal) Is it a good kind of leadership? It depends, if the right moves are made, empires don't end, but if wrong, empires die. Such factors chronicle on who is making decisions based on what: public opinion vs personal veto. To do the latter, it means to understand it deeper than anyone else... *perhaps the tendency of brutal honesty in order to lead may fare better in the long run, rather than its opposite. Saber however, seem to demonstrate serving the people first, it is a government type of management perhaps, allowing the weak to be saved, rather than abandon.
Gilgamesh talks of an unapologetic empire that spreads and conquers, in corporate giants this would be a massive financial empire that fills and fills, engulfing all that is underneath it. Think the sunglasses giant Luxotica, now imagine that as Gil's speech, he mentioned of everything of treasure belongs to him, if you take essence, he meant as acquiring everything under the sun under his brand of leadership, his was to spread influence, and all under him shall obey the franchiser/head office under no circumstances be allowed to venture beyond its walls of rules and concept. If the head office has worked on formula A and it works, everyone will follow formula A to the letter. In his way, the weak must perish for the strong.
now this is just me of course, I see it in this way.