Difference between single siniwali and double sinawali

What are the difference between single siniwali and double sinawali, But at it’s core it’s only 3 strikes, repeated again and again, on the left and on the right side. These 3 strikes are repeated with alternating hands. Right, left, right, left, right, left… Here is the one person version of the basic sinawali striking pattern (also known as ‘heaven 6’ in some systems).