If I were to weigh in here, absolutely keep the 10. Not only is it better working, they tend to type better too! I have had some problems with the internal parts of the LC Smith standards, particularly that thin cast rocker. There are competing forces acting on it for the ribbon lift, and it's hard to get them just right. One wrong move and SNAP! The Royal 10 has been my trusty companion for years, they're robust, easy to work on, and rock solid. I'd pick it any day, the age holds nothing on it.