Anxiety disorders; I sometimes take benzos. Alprazolam I feel intense calmness, while clonazepam has no physical effects. Might it still be anxiolytic?

Yes. Clonazepam is a calming benzo like alprazolam but it's onset is slower and it lasts longer.
Benzodiazepines. Alprazolam has a very rapid onset but also short half life. Clonazepam can have more rapid onset if you chew it and put under your tongue and stays in your system longer than alprazolam. Consistent use of any benzodiazepine leads to tolerance which is more rapid with alprazolam. There are other meds that can help anxiety without developing tolerance.