Truth be told, the R11's are clearly superior, and allow a superb lineup of 3 top Cleveland wedges with great distance separation (100y, 80y, and 60y), as the hybrid is essentially useless or unnecessary. The stopping power of those wedges on tournament greens is a big plus, compared to their lesser counterparts, reduced to 2 in the G20 scenario; i.e., 90y and 60y. Still, if the slightly slower meter is of serious interest to you, the G20 clubs are a good option that keeps you capably in play from the legend tees, all the more as the driver puts the ball into orbit with a very respectable 280y.
I suspect, however, that an R11S upgrade will eventually put the G20S further to shame. But that's all right in my books.