I haven't tried either of those, but I tried some cheap no-name one and a Pogo stick and didn't like either. I ponied up a little more money and recently bought the Kensington one and I love it. It has a pen on one side (I used to carry a separate pen) and the weight is much better. It also has the rubbery tip instead of the foam tip, which glides much smoother and is more accurate.