Scala is certainly the more researchy language with an advanced type system, better type inference, and multi-paradigm. However, its compilation is horribly slow, programming styles vary wildly, and I find its tools e.g., SBT, to be underdeveloped.

On the other hand, Go has constrained features and complexity, while providing higher-level features like GC, first-class functions, and simple type-inference, along with excellent tools e.g., gofmt and the build system.

I don't want to imply that one is simply better than the other, but I have enjoyed working in Go much more than Scala.