When comparing CheckiO vs The New Boston video series, the Slant community recommends The New Boston video series for most people. In the question“What are the best resources to learn Python?” The New Boston video series is ranked 12th while CheckiO is ranked 18th. The most important reason people chose The New Boston video series is:
The tutorials are completely free.
Ranked in these QuestionsQuestion Ranking
Pros

Pro Community backed solution reviews
Users can publish their solutions for different problems and other users can review the code and give their opinions on how they would have solved the problem.
Sometimes, some of the most active users get their code reviewed by Guido Van Rossum (the creator of the Python language) himself.
Pro Available in multiple languages
CheckiO crowdsources translations for problems. Currently problems have been translated in 10 languages. So it's highly possible that eventually more languages will be supported.

Pro Ability to create new challenges
New missions can be created and uploaded using GitHub. After that is done, it's suggested to CheckiO and if it fills all the requirements after being reviewed by a CheckiO team member, it's pulled into the game.

Pro Challenges from GitHub, O'Reilly, Dropbox and Hubspot.
Pro Everything is free
The tutorials are completely free.
Pro Video tutorials
Tutorials are presented as videos, making them easy to follow / see what's going on at each step. Many people find this format less daunting and easier to take in than traditional text based tutorials.
Pro Suitable for beginners
No assumptions are made about prior knowledge, meaning anyone can start watching and pick up the basics fairly quickly.
Pro More than 200 video lessons
Cons
Con Not for absolute beginners
CheckiO does not teach syntax, instead it teaches how to solve problems using a particular programming language therefore some basic programming knowledge is required to start.
Con Somewhat outdated
These videos are a few years old (2011), so there is some content that is a bit outdated.
