Odin is more similar to Zig or C, very similar to Zig I think, but less boiler plate and more similar to Go syntactically. I have also found Odin to be a bit more friendly than Zig to get compiling and running, less required safety. There is far fewer features so I wouldn't really compare it to C++ or Rust. I am not familiar with Hare.

Don't have a comparison, but I've written toy languages in a few of them.

I only really feel confident to talk about Rust, Rust stands out when it comes to parsing (functional bros unite), but does suffer when interpreting because of unsafe memory access - although for a compiler that shouldn't be an issue.

Odin is great, but I feel like it doesn't have enough syntax sugar to make languages easy to work on - that being said you can achieve most of what you want in a mostly comparable way if you're willing to write more ugly code. In this way it's very similar to C.