I have read charts saying they were equivalent mg to mg, and charts saying clonazepam is two times as potent as alprazolam. I have had my share of experience with both, and still find it hard to compare them mg to mg. They are different. Alprazolam comes on fast, and is a good anxiolytic and anti-panic, its effects last for a shorter time than a lot of the benzos. Clonazepam doesn't come on so fast, is still a good anxiolytic and anti-panic, but has stronger muscle relaxant properties, its effects last for a while compared to a lot of the other benzos. Clonazepam seems to me to be more subtle, but more relaxing (generally), it seems to have a somewhat subtler, yet thicker effect. Alprazolam seems to do the job it should, and kicks in nice and fast, but doesn't cause as much sedation for me as clonazepam. Clonazepam is a good benzo, as is alprazolam, but they are somewhat different.