There is no clear winner. Haskell wins on having a powerful type system and producing generally efficient code. Erlang wins the maintenance-race by far since yo

There is no clear winner. Haskell wins on having a powerful type system and producing generally efficient code. Erlang wins the maintenance-race by far since you can trace on the running system and deploy code while it is running. And the fact that Erlang is built to be robust over fast. Saying that Erlang lost in its home turf would be a wild extrapolation of what I wrote. I don't really think there is a clear winner, but rather a set of trade-offs you will have to make.