All mentor are of a gummy bear consistancy which is what mya use, and it can vary depending on what your surgeon would choose for you as if you have under the muscle, a smooth implant is used which comes in different levels of cohesiveness which doesnt equate for much just how firm the implant is i.e cohesive I being softest and cohesive III the hardest, i myself had overs and my surgeon chose to use Mentor Siltex Round textured High Profile implants which i wasnt even aware of until after surgery (something i never asked about nor mentioned to me) and he used the cohesive II which is in between, i did know what size(500cc) and what profile though
im sure they choose which is better for you and also the look your trying to achieve, but all of them are just as safe as each other its all about look and feel xxx