Ask HN: Does Dart beat Go in Go's best of features?

I am trying to learn a language purely for the joy of learning and exploring as many programming concepts/idioms/paradigms/expressiveness/algorithms as possible.

All I want is apply these languages into the prime purposes it was designed for, but on one condition that I can choose only one - either Dart or Go, after careful evaluation of languages out there.

I am not learning for career and big projects perspective. I have some small projects in mind mostly around web development.