The directions on the wiki aren’t very clear and doesn’t explain the difference between flashing to the NAND or eMMC. D
What explanation do you need? You’ve multiple images, one for each storage type, pick whatever you would like to use and use it.
Also, any experience with the BPI mini
Never used that one. I’m not even sure about what board you’re talking about. Look up on the supported hardware table if it is supported and how good the support is.