You need the 200s. That way when everyone asks which ones you have you can stare down your nose at them, hold out your pinky and say, "I, sir, have the 200s."
They're also good for the YouTube videos. "During high speed, dynamic tactical operations I run the TSR-200 sighting system on my .22 long rifle weapons platform." Adjust your shemagh and roll the eff on!
In all seriousness, I like the 200s because I can adjust for windage and elevation at the rear and don't have to unsling. The dinosaurs will be along in a second to tell you there's no need to unsling to adjust the 100s because you can reach the front without taking your sling off. They're right, but I didn't know that when I bought my first set and I went with the 200s. Since I'm vain and want all my gear to match I just kept on with the 200s.