Udacity vs Code Avengers

Courses are always made available which means there is no waiting for the specific course you want to run. You can work through the courses as fast or as slow as you want.

Udacity offers a few different Nanodegrees which provide access to various different courses, project reviews and coaching support for $200/month.
Current options include Front End Web Developer, Data Analyst and Android Developer. See the full list here.

You get actual feedback from developers on your code, which is useful. Yes having your sites/apps do what it is supposed to do is important, but you need feedback to learn industry standards/best practices and other gotchas that are much harder to learn on your own.

Courses are super easy to follow, even for super dummies.

Code Avengers makes their material engaging and interactive, which aids with understanding and retention of the material.

Explains what everything is before you must use it, unlike Codecademy, which just kind of tells you to do stuff. To figure out what everything is exactly, you must either look at the glossary or google it.

Not only do they offer Python, CSS and HTML, and all the works, they offer them in context packages, where you can work on a project that utilizes one or the other. Also, there are different recommended tracks for different purposes - web designer, etc.