Zig's comptime idea is definitely an edge to Zig. It's an elegant feature that solves a lot of problems. However, using it for parametric polymorphism is very clunky. Not that it's a bad way to think about PP, but right now the ergonomics are just not there yet.

Odin has a sophisticated PP system, which supports something like dependent types last I checked.

Odin's context system is excellent. It is similar to implicits in Scala, but Odin's is by far the best implementation of the idea that I have come across. If Go wanted to make context part of the language, they would do well to understand Odin's context.

Odin doesn't do OOP. Zig does. I don't know why a C replacement would try to.

As far as leadership, Andrew (Zig) is the better open-source leader. He's better at engaging with the community, attracting people to his cause etc. But as far as a language designer, GingerBill (Odin) really "gets" it. If you listen to him talk about language design, it's very clear he's given it much more consideration than pretty much anyone.