From the above webpage is the start of the MDN Learning Area which consist of a series of articles taking you through the basics of HTML, CSS, JS. On the same page is a link to a front-end developer course. It seems like some of the links in the course are just to articles in the Learning Area so I’m not sure if the course is just a collection of selected articles relevant to becoming front-end developer and the Learning Area being the comprehensive resource for all web developers (front-end, back-end, full-stack). Is anyone familiar with the differences?
they both link to same material but the new front-end dev just arrange them in better way and give you hint which subject you need to learn before another one and give you some details about the estimated time you will take for each task
hope that help and have a nice day