Was DS quieter as a baby/child?

My 3rd was incredibly quiet in utero, and is so far (5 weeks so i know only early days!) so quiet and calm (and sleepy?) compared to the others.
Much more placid to date (10 months) than DD has ever been. Very happy go lucky and calm little guy. He crawls around just giggling away. Sleepy? not so much . DD highly strung, anxious and determined. As a baby I was sure if she could pack her bags and move out she would! Not sad and miserable just a very serious (albeit beautiful- of course! ) baby. I am quite surprised that he is meeting most milestones at a very similar age to DD.