Is There a Difference Between Ruby and Haskell?

At No Red Ink, we have a big legacy rails code base and a Haskell code base that are coexisting. And most of the people on the team started out with a Ruby background and learned Haskell. So it's not like they were unfamiliar with how to like defensively check for nil. We started using sorbet types, which is like type Ruby for some of that. I don't think anyone's ever done this analysis: going back and looking at the end points that we've added sorbet to and comparing the error rates there against those where we didn't.