DS1. He settled off to sleep much quicker tonight, although late afternoon/ early evening when it was DS2 having a nap... hence his late night and thus balance is restored 
Seriously, I love them equally and admire different things about them. They are different but complimentary to each other. Both have their moments, funnily when one is playing up, the sibling plays at "golden boy". Most of the time they are a joy.