Getting on right perscription for ADHD

Patient: Hello,I was diagnosed with ADHD a month ago, and I was put on concerta. However, my brother was given 10 mg of Adderall 2 years ago and once I was diagnosed I tried his. The Adderall worked a lot better for me, so I want to talk to my doctor about switching, but I don’t know if I can mention that I tried Adderall?