Hmm I don't remember any differences in the endings for solar or lunar wins, do any specific transformations influence that or is it JUST a win overall? I did notice Fatuity influencing some outcomes but with so many of them I wasn't sure what exactly makes a difference for endings. Like did I need a specific Separation/Multiplication change to occur to influence a special ending? Did a certain physical change need to happen? Do I need a sex scene to happen with a character during the game to have a better ending with them? That's why I love these kinds of games with a lot of choices and different outcomes, but it can get overwhelming so walkthroughs are always welcome (sometimes even a must) lol.
Except for the one "Fatuity" ending, all of the major endings only depend on who wins and if they won with solar or lunar alignment. That said, all of the endings contain unique dialogue for certain transformations, so you're not likely to read the exact same text even if you get the same ending multiple times.