The shaped implants in my opinion are a good option for women that want to have a bigger implant and still avoid a fake appearance. Shaped implants are also a good option for patient undergoing breast reconstruction. When patients are using a very small implant, the difference between a shaped and a round silicone implant is very small.
They are both good implants, and this is where your plastic surgeon will help guide you on what implant will help you achieve you aesthetic goals.
Please consult with your board certified plastic surgeon to help guide you on what implant would be best for you for your breast augmentation.