Need method to check Tutorials when they fail

For mysterious reasons sometimes I cannot get tutorials that I am following to work. Scrubbing videos over and over again to find the mystery sometimes does not work (and I hate doing it), AnswerHub might know, but they don’t always know the words that I am typing. There needs to be a tool to cross check tutorials to expose the differences, and if none, then what? Well goto AnswerHub. Unity has something like this. Unreal needs a tool that can cross compare projects and display differences.

I know diffing is standard tech, why is it not standard in the Unreal learning system? It clearly needs to be.