1, the appearance is different. The lip bead of M-class lip protrudes forward and downward, forming an M-shaped curve with the labial red tissues on both sides of lip bead. There are no traces of lips, and there will be obvious depressions in the middle of the lower lip, just like petal lines. Lip bead on both sides of the lower lip is also more obvious because of depression.

2, the characteristics are different, M advanced lip lipstick makes people's facial features more three-dimensional, seamless lip lipstick makes people younger, three-dimensional sense is not strong.