A good tutorial - well-written, and well-detailed! I'd say it's better than the other one
. I'd do a few minor details differently if I was making that avatar, but nothing greatly different.
Did you know that if you click on a straight line in node edit mode and then drag it, it will automatically become a curve? I find that to be quicker than selecting and clicking the 'make curve' button.
Other than that, an excellent piece of work!