Happiness vs. Life Satisfaction

I just took a very short Satisfaction with Life Scale (SWLS) questionnaire online. I was honest, and it determined that I’m on the border of ‘satisfied’ and ‘extremely satisfied’ with my life. I rationalized that by deciding one shouldn’t be totally satisfied (i.e., complacent) with their life! But, I’m definitely happy. So, this made me contemplate (and look into) Happiness versus over-all Life Satisfaction.