Mojo and Julia have some very fundamental differences though...

Mojo is a fully ahead-of-time (AOT) compiled systems language. Julia is much more dynamic, and its AOT compilation story is still quite weak. Mojo also has explicit memory management, unlike Julia and its real time unfriendly garbage collector.

Mojo also has the concept of ownership, similar to Rust, while Julia does not.

Mojo is being pitched as an efficient, general purpose, Pythonic systems language which can target a variety of hardware types. That seems like a good target to me, I hope it's successful!

One thing to keep an eye on is whether or not a Windows port emerges after it's open sourced...