Cyberpunk can be dystopian or not, but it accepts that people will use technology in ways that deviate from what those trying to control everything and make a pretty utopia have in mind.
If Solarpunk, there is a possibility that the planet could be green. Also political extremism would lose support from the population. And it is likely that the solarpunk would bring up the utopia and the planet would become green.
So, I prefer Solarpunk to live a nice, peaceful life.