To me the latter is no less clear so yeah, substantially more.
For context I write Elixir once a week and Ruby once a decade. In particular in this case elixir’s (and erlang’s) arity disambiguation (the slash) seems like unhelpful noise. Enum.map only accepts single-arity functions so it seems weird to me that the language couldn't figure that out for me.
Huh?
I don't know that I'd call this "substantially more" of anything.