Three things that make the experience of developing in Elixir completely different from Erlang: Tooling, libraries, and actual language features (that aren't just skip deep).
Spend 5 minutes developing an app in Elixir and you'll realize why it's not just "only syntactically different" from Erlang.
Spend 5 minutes developing an app in Elixir and you'll realize why it's not just "only syntactically different" from Erlang.