What is the difference between controlled marbling and uncontrolled marbling​

Controlled marbling is when the marbling is all planned out and fits your liking/how you wanted it to look while uncontrolled marbling is freer and open-spaced and can turn out however

Explanation:

Controlled vs Uncontrolled:

well seeing i am an artist and i actually did a self portrait; i will describe how i painted it.   i used acrylic on a stretch canvas about 4 feet wide by 6 feet tall. i painted myself smiling in a soft pink long dress, white tile floor sitting on a white couch with a table behind and a vase of gorgeous flowers.   i also had a round white hat with a soft pink ribbon through it laying on the floor and on the table behind me was a lit candle. i kept it simple but soft and romantic.