Whats the difference between the yaz birth controll pill and yasmin birth controll pill?

The only difference is the estrogen levels. Yasmin has 30mg and yaz has 20mg. Its like ortho tri cyclen and ortho tri cyclen lo. Another difference between Yasmin and Yaz is that Yaz has 24 active pills, and only 4 placebo pills. yasmin has 21 active pills and 7 placebo pills. Both have the same progestin & same amount: 3 mg drespirenone