I don't use Anki, but I do use Space Repetition. I've explored different styles of stacks, and found that even for apparently identical underlying information,

I don't use Anki, but I do use Space Repetition. I've explored different styles of stacks, and found that even for apparently identical underlying information, some formulations of that information work and are acquired easily, and other formulations simply don't work. The underlying "atoms" you embody in the cards matter, and possibly matters a lot.