I think Opus + Claude Code is the more competent overall general "making things" system, while it makes sense to have a $20 Codex subscription to find bugs and review the things that Claude Code makes.

On its own, as sole author, I find Codex overcomplicates things. It will riddle your code with unnecessary helper functions and objects and pointless abstractions.

It is however useful for doing a once over for code review and finding the things that Claude rushed through.