I'd argue that obtaining the right to work in the EU is likely to be easier for any random individual in the world than for the USA. It's no joke getting a US greencard unless you're a fortunate greencard lottery winner.
The EU, meanwhile, has many, many countries, lots of whom carry legacy colony obligations or emmigrants to overseas. This often entitles potential EU immigrants to colony or parental rights in at least some country in the EU. The list of EU countries is also growing. I don't think there is much of an equivalent for the US.