My reasoning for this inquiry is to add some meat to discussions concerning "Is a revolver sufficient for concealed carry?", "Do I need to carry a high-capacity autoloader?", and similar topics.
Do not take this offensively, because I take the role of learning and sharing on this site seriously. But the questions you cite, and many similar ones, are really nonsense questions in the world at large.
Why do I say "nonsense"? Not because I think your questions are stupid, but because the logical answer to these are strongly rooted in the circumstances behind any given encounter. OBVIOUSLY, for example, "more is better" when it comes to being armed. Within limits, of course...trying to carry 8 firearms and 37 pounds of ammunition would be somewhat debilitating with respect to both the weight and the ability to effectively fight carrying all that at one time.
Another reason I say it's a nonsense question is because it's so open that anybody can easily put up circumstances in which a revolver is sufficient...and in which a revolver is sadly insufficient. Same for high capacity pistols.
The plain fact of the matter is that there's more to carrying any given firearm than "revolver or pistol", "6, 8, 15, or 20 rounds", "no reloads vs three reloads", etc. The reasoning behind what you carry and how much you carry must encompass a holistic logic.
For example, some people may choose to carry a revolver because they're comfortable with it, they don't have the hand/arm strength to reliably work the action of a pistol, they're far more reliable mechanically, or simply because "that's all they've got".
Some people may choose a low capacity, single stack 9mm because it's slim and easier to conceal than a full sized, double stack 9mm. Some may choose a 1911 design with a 7 round magazine, because by God they can really shoot/operate that pistol! Or this make/model fits well in their hand, or having 15 round reloads is important to them, or whatever.
THE IMPORTANT THING about choosing a carry weapon is that you CARRY the weapon, first of all. And, of course, be able to operate it with reasonable facility.
And don't forget the training. You train with what you have, not what you would dream of having, and it's the training which will prepare you for whatever scenarios you can envision more than anything else.