what is the difference between an innie and an outie vulva?

My vulva is still inside the lips but you can see it if you look straight up at it?? It's not like enclosed completely. What is it? I've just never heard these terms 
EDIT: someone on <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> made a poll asking which was prettier. I know it doesn't matter. I'm just curious