When my oldest was little, she was easy to take care of. She was cautious, well behaved in public to the point where we got complemented on her behaviour. I stayed home for 4 years with her and hardly had to clean up messes from her. She also listened to “no” and quit the first time we asked. 

We decided to add a second thinking it would be the same story. The hurricane is now 2 and the complete opposite (not horrible behaved in public but she does enjoy screaming, yelling and talking to everyone. ) 

I’m worn out by noon typically with her. I love them, wouldn’t trade either and wouldn’t change either personality but I never knew 2 sisters could be so different and look so much alike.