Sientra moderate plus vs Mentor boost moderate plus for a more natural look (photo)

Switching to Motiva Ergo 2 Demi profile should be the best option for natural look and feel. These implants are unique about softness and shape; they are originally round but act as anatomic implants when patient stands. With minimal complication rate also gives safety.

The most natural appearance comes from using smaller implants with lower profiles guy.
Silicone has a slightly better feel and potentially improve shape, though size and contour is far more important in regards to shape.
If you want to avoid a fake look, then don’t use excessively large implants and avoid high profile implants.
I wouldn’t worry too much about what brand is used.
Best,
Mats Hagstrom MD