Games are still in development with the Wii MotionPlus, and hopefully for the better since the Wiimote is still very limited in sword based games. I just hope the MotionPlus does some good though otherwise its not really worth it.
But out of the two games though, I guess it just depends on which one appeals to you more. Both offer 1v1 gameplay. Clone Wars Lightsaber Duels, and as the title implies, focuses more on this type. The Force Unleashed I find is far too "waggle-heavy".