I'm sorry you are having to make these tough decisions & for your cancer diagnosis. Both procedures you described are the same bilateral means double mastectomy. Lumpectomy on the one side is what I'm thinking you're referring to. My situation was made easy when the area they need to clear when taking out the lump was going to be so large that I had to remove it all .For me the shock came when my MRI picked up 3 small areas on right and all self contained and in different parts of my breast and a double was the only answer. The tough decision for me was reconstruction or not. Have you consulted a plastic surgeon yet? I had a consultation and after a lot of thought and talking with others who had reconstruction & those that didn't i chose to not do reconstruction. I would suggest if you haven't seen a plastic surgeon for a consult to do so - they will have the best answer on what they believe would be best. For me I ended up with not having reconstructive surgery because too many subsequent surgeries & issues that can arise after (friend had leak & developed Lupus) I chose prostheses. It's a tough decision but getting input from Dr's. & others is the best - when I was deciding my surgeon said if I was still not sure what to do on day of surgery there's the option to leave enough tissue for reconstruction at a later time. So good luck with your decision, don't feel pressured and do what's right for you . Take care💜