I'd recommend going through https://odin-lang.org/docs/overview, as most of my points will be directly from there. Keep in mind it doesn't show _every_ feature (for instance, there are more built-in comptime procedures than shown https://odin-lang.org/docs/overview/#built-in-procedures-1), but does do a good job at displaying most.

Odin has all the features Go has (even struct tags https://odin-lang.org/docs/overview/#struct-field-tags), but adds:

- proper enums

- or_else/or_return/or_continue/or_break https://odin-lang.org/docs/overview/#or_else-expression (scroll down for the others)

- built-in quaternions

- ternary operator, but you can use `bar := 1 if condition else 42` instead of ? and : if you'd like https://odin-lang.org/docs/overview/#ternary-operator

- fantastic C integration

- proper slices (not the Go monster which combines a dynamic array along with slices) https://odin-lang.org/docs/overview/#slices

- `for x in xs` instead of `for _, x := range xs`, and `for &x in xs` if you want `x` to be addressable

Language cohesion has been _incredibly_ well thought out.

Odin, a pragmatic C alternative with a Go flavour