After wearing the Solar Boost all-day, it's time for the Tempo 9 during my night activities. Although the plushness of the Solar Boost is really evident, the Tempo 9 makes up for the light weight. I immediately noticed the weight difference. Plus, it's just now that I've learned that the Tempo 9 needs a break-in in order to conform with your feet.
I am now feeling the response of the Tempo 9 the same way as the Solar Boost. Although in terms of over-all comfort, I'd have to go with the Solar Boost. Not considering the breathe-ability that is.