Yes kinda, sorta the same situation. My mom is smart but more so in a practical way. I could never talk with her on many subjects that interest me. I think I have inherited my natural inquisitiveness (is that even a word?) from my father. He is also the more intelligent of the two.
I have a younger sister. I dunno, sometimes I think it's me not them, but I have very, very hard time relating to people and communicating and interacting. Finding common ground and common interests. I think I feel most comfortable when I'm by myself.