I am still a beginner as well so I don't think I am qualified to say which stiffness is best for learning. My experience is that I found the Moto (which is the same response rating as TWC) to be just a tad too soft for me. I should have gotten something like Burton Ruler.
I am unfortunately stuck with it, since I damaged the shoe with my board's edge. So I can no longer return it for a different product. I will still give it a try for the rest of the season to see if it gets better as my skill improve.