Any suggestions; crescent vs donut breast lift?

What is the difference between a crescent and a donut breast lift? I spoke to one surgeon who says I should get the crescent and another one who says the donut. I am very confused. I am 26 and never had kids. I have a small B. my breasts are very asymetrrical and the areolas are a little bit big. I am unsure what is best. I do worry a lot about the scars. but i dont want to do a crescent to later have to do it again.