The difference between 3-2-1 ribs and 2-2-1 ribs is entirely up to personal preference! 3-2-1 will make for extremely soft, tender meat that falls clean off the bone. 2-2-1 smokes the ribs for one less hour, meaning that the meat will be less cooked and therefor cling to the bones, giving it more chew. The way you cook them is up to what you prefer!