Will larger, lower profile implants create more lower pole fullness? (Photos)

I had a prophylactic mastectomy with reconstruction. My original implants were Mentor Boost SMPB 390 cc. I then had to have a capsulectomy and traded my implants for Natrelle SCF 450 cc. I now have a lot of upper pole fullness which I don't like. My breasts look squared even with a padded bra. I plan on having surgery to trade implants. My surgeon wants to stick with a Natrelle high profile implant due to rippling. She is suggesting Natrelle Soft Touch. However, I am concerned that I will be left with the same problem of upper pole fullness and maybe worse, because of more rippling. I'm wondering if trading for a moderate profile implant, but larger would create more fullness. She said that if I go lower profile I would look flatter. I wonder if going lower profile but larger size would give me fullness without looking too flat.