I think it totally comes down to your learning style. If you learn best by tinkering with a running system and seeing how your changes affect it and piecing tog

I think it totally comes down to your learning style. If you learn best by tinkering with a running system and seeing how your changes affect it and piecing together its foundations that way (like I do), fast.ai is for you. Deeplearning.ai I think appeals more to people who do better with understanding the theoretical foundations before trying to implement something.