White miso is a milder miso than red miso, so the end result is milder. Red miso achieves a savorier, cheesier, and deeper flavor, which I prefer.
If you don't have any cheese cloth, you can apply the miso directly on the avocado, then wipe the miso away when curing is done.
Miso cured avocados are great on salads, crackers, sandwiches, wraps, etc. For a cooked option, it's delicious with rice, toast, pasta, etc.