When comparing Codea vs Nez, the Slant community recommends Nez for most people. In the question“What are the best 2D game engines?” Nez is ranked 89th while Codea is ranked 107th. The most important reason people chose Nez is:
The community is very active, so if you ask for help you'll get it relatively quickly.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Helpful code editor
Errors show up live, as you type. Smarter autocompletion picks up your local and global variables, including nested types. Everything else is just plain smarter, from indentation to highlighting.
Pro Ships with music and sound packs
Codea ships with three great music and sound packs, composed just for Codea and free for you to use in whatever you create.
Pro You can code on an iPad and easily distribute the game
Pro Location library
Location library lets you make use of the GPS inside your iPad. Get your latitude, longitude, altitude and more with a dead-simple API designed specifically for Codea.
Pro Active community
The community is very active, so if you ask for help you'll get it relatively quickly.
Pro Open source
Completely free, no need to pay for licenses.
Pro Cross-platform development thanks to the use of mono and xamarin
Nez is built on top of monoGame and can be used the make games for many platforms (Windows, Linux, Mac, Android or IOS).
Cons
Con Just a framework
Meaning there's no visual scene designer so you'll have to write your own.