Just to add one tiny point that might be important to some: with Medigap Plan G there is some out-of-country coverage; I think that might be one differentiator versus Plan N.
One of our kids was living in Germany when I turned 65, so that was a big factor. Never needed it, but you never know. She’s moving back to Europe soon, so it may still come in handy.
I am fortunate enough that I won’t have to worry about choosing for myself ( my former employer’s insurance will act as a Medigap plan but better) but I did have to help my mother find a less expensive plan a couple of years ago. She had Plan F, I think, and she was basically paying for benefits she didn’t need - Part B excess charges are prohibited in NY and she never leaves the US. So you really have to look at your specific situation.