At first glance, Klonopin (clonazepam) and Xanax (alprazolam) are similar. Both Klonopin and Xanax affect the brain in the same way. Learn the differences. So you pop one Xanax and 10 hours later, its decayed to half a Xanax in strength. .. how many.5mg clonazepam equals 2 mg xanax??? Apr 22, - This question has also been asked and answered here: Klonopin vs Xanax - How .. Anxiety Disorder and have been taking medication for the last 10 years. .. What is the difference between 2mg Klonopin and 2mg Xanax?Is clonazepam the same as a 1mg xanax? I don't want to be a zombie all day. For Klonopin, on the other hand, the half-life is listed as anywhere from 18 to 50 hours. I can tell my DR. I know the Clonazepam is supposed to last longer but take longer xanaz hit. Xanax is one of the strongest benzos and one of the most abused.