I'd love to see a write up about the differences between all these. "Find one you like" makes it seem like a good search engine is more subjective than it is. I

I'd love to see a write up about the differences between all these. "Find one you like" makes it seem like a good search engine is more subjective than it is. It would be cool if these companies collaborate and shared their indexing strategies, algorithms, etc to make the whole alternate search engine space better in general.