The Duo 13 is an excellent machine, but the stylus uses N-trig technology, not WACOM. It's sufficient, but a WACOM stylus has 2 advantages: It's more responsive

The Duo 13 is an excellent machine, but the stylus uses N-trig technology, not WACOM. It's sufficient, but a WACOM stylus has 2 advantages: It's more responsive and accurate than N-Trig, and it doesn't require a battery. Basically, the Lenovo Thinkpad Yoga will have a better keyboard and a better pen, but the Sony has almost double the battery life. If you aren't an artist or a designer, an N-Trig stylus isn't the end of the world. If I were in the market for either, I'd wait for some reviews to come out for the Lenovo machines before making a decision.