I am having breast implant revision surgery with a breast lift. My surgeon is going to use mentor memory gel 425cc hp. Years ago I had 415cc sientra hp hsc+. I’ve read that the sientra hsc+ is more cohesive than the regular mentor implants. I am wanting to know if the mentor hp 425cc which has the same width and diameter as the 415cc sientra hsc+ will be the same? Will it hold its shape as well? Is the mentor as cohesive as the sientra hsc+?