There effects are not that similar - it depends on the person. For me, klonopin
is much more sedating and almost depressing. He doesnt have energy to do much. Xanax
on the other hand gives me a boost mentally and even physically for minor tasks. He doesnt take it before a workout, but before he cleans house or works on a creative endevour, hell ya.
Mixing them can give a different feeling than either one on their own provides as well. Not much synergy, maybe its just additive, but its nice. It seems like I go through less of each of them by combining them. Which is nice.