Overshadowing syblings

[Perseus]

As i struggled thorugh calc today, my dad walked in. Seeing me in an utter state of distress. He tried to cheer me up, ending his 10 minute speech with "if your brother could do it, so can u."

that got me thinking, what if thats not the case. I mean, my brother is naturally smart. I am not. i work for my grades, he just breezed through. he has set the bar very high and i think its unlikely i will reach it. I was just wondering if ne one else have syblings that "overshadow" you?
this is also to get out some of my anger and frustration.....