I was given 2 choices as well which surprised me as I thought the oncologist would just tell me what I was doing. My choice was basically 12 weeks or 18 weeks with a treatment every 21 days. My first thought was 12 weeks just because it was shorter. After reading all the paperwork I decided on the 18 week course as I thought it more thorough. Can't really help with your decision, sorry, make sure you know all the facts and go from there. When you feel comfortable with your decision you will know you've made the right one. All the best with whatever you choose, take care,
Hazel xx