[baranul]

Odin appears to only recently have been pressing the claim of Go alternative, as a new direction in its marketing hype. There are Go and Pascal influences, but Odin is arguably much more similar to and an alternative of Jai[1][2] (from Jon Blow). Maybe the strategy is to try to distance itself from the label of Jai-clone or Jai-lite.

If Jai goes public beta or releases books (upcoming from Ivo Balbaert), then Jai has the potential to kill off Odin, which appears to only been able to keep a smallish following (relatively fewer GitHub stars and lack of Wikipedia page) since its birth in 2015 or 2016. Odin's popularity, seems dependent on Jai not being public yet.

The languages which are truly close to Go, are: Go+ (goplus)[3], V (vlang)[4], and Borgo[5]. V has the methods on structs, as you have mentioned. Go+ and Borgo compile to Go. V compiles to C, along with other backend options, and has a Go2V transpiler. These languages are more of an evolution of Go, that provide additional features and functionality, and where the influence is much more obvious.

[1]: https://github.com/Jai-Community/Jai-Community-Library/wiki

[2]: https://youtu.be/M763xHjsPk4 (Jai vs Odin)

[3]: https://goplus.org

[4]: https://vlang.io

[5]: https://borgo-lang.github.io (note- weird issues over lack of license)