Can you share any thoughts on which would be best for a computer vision newbie and programming novice to get started playing with? Or are none of them really great for that?
E.g., recall the awesome project for lego sorting by jacquesm[0] ? He built his own model using Keras and Tensorflow, but you may be able to achieve similar results by using Clarifai's feature to train your own models with no understanding of deep learning. This is great if your goal is to build a thing, like a lego sorter, but not so much if you want to learn how to build a state of the art image classifier.
If you're interested in learning about computer vision or deep learning, I recommend searching this site to find threads that cover that extensively. Good luck!
[0] https://jacquesmattheij.com/sorting-lego-the-software-side