I like the look of the 2011 button, and I actually prefer the look of a steel button over a brass one. I also like the hex head that I can grab with a tool. But I have to say that I do like the adjustable throw on the old button, and I have one complaint about the 2011 button.
My complaint with the new button is the locking nut that fits against the engraved tube. It is so small that it is hard to get a grip on to tighten it enough to the body. I can barely grip it with needle nose pliers without scratching the engraved tube, and if I try to tighten it by hand, it always comes loose when setting the button lock. I wouldn't mind a button that sticks out a couple more mm if it means I can safely grab onto the lock nut with pliers to tighten it just a bit.
But other than this small complaint, I love everything about my SS GGTS!