They will recommend high or low based on the sort of results you want and your body frame – dont worry they will have chosen what’s best for you!
I think I was recommended low as I wanted a very natural look. They are flatter and wider I think. Girls with very small frames tend not to have low profile as they would be too wide for them.
I think that’s right as far as I remember, anyone feel free to correct me 
If you ask your pc she can tell you why your surgeon had chosen it for you xx