Hello- For me, Klonopin is better, it lasts longer. Xanax just didnt last long enough for constant anxiety, but it would be good for say a dental appt. I think Klonopin is more subtle in its effects, but that's me, and I have a great psychiatrist that helps me figure out what's best for me. I usually just have to take klonopin at night, and it lasts through the day for me.