They are very close. I think a rewrite wouldn't be too crazy. But there might be libraries available only in one or the other. Also F# is .NET based, which has

They are very close. I think a rewrite wouldn't be too crazy. But there might be libraries available only in one or the other. Also F# is .NET based, which has the clear benefit of adding a huge standard library, but at the same time the OOP-based design of .NET makes for uglier than necessary code in F#.