I have the set of 3. Given a choice between the 14 and the 20, I would definitely want the 14. The 20 was just a splurge for me. I do grab the 20 when I'm cutting in thin material, although as my control with the 14 gets ever better, I grab the 20 less and less. A year from now, I'll probably think the 20 was not worth it. I may end up filing it for crosscut and simply dedicating it to my pen making station.
Again, nothing at all against the 20. It does a fantastic job in the thinner woods. I guess I'm just starting to realize that maybe this is all much simpler than we generally make it out to be, and that there's such a thing as "good enough" where better doesn't increase the quality of the piece, and that the 14 is good enough for everything I do.