Hi Victoria,
I had 380cc over the muscle, as i had breast fed 3 babies so had plenty of breast tissue to fill up. Overs can look just as natural as unders, but only if you have enough breast tissue to cover the implants. From pictures i’ve seen, sometimes unders can leave a bigger gap between the boobs and therefore make it more difficult to get a cleevage, but maybe the gap gets smaller over time? My overs never gave me a gap, and i can get a great cleevage.
I think if the surgeon has said that overs would give you the look you want, then you will have enough breast tissue. Which surgeon did you see?
xx