Perhaps in raw computation its more similar, but based on the context of your comment (and its parent), it seems more like you're comparing it to ruby+rails in a real-life scenario (say, a web app). (The original comment was about "what did he gain"?)

In that case, the multithreaded nature of Elixir and the VM there's no comparison.

I tried searching for raw ruby+erlang benchmarks but couldnt find much in the short time I looked.

Can confirm, elixir+phoenix outperforms ruby+rails by ~10x.

If we're talking about pure ruby and elixir, things become complicated, you can do some stuff a bit faster in ruby sometimes (where ruby is using native optimized C code)