A concentration camp is a facility where individuals are detained without legal process, often based on their ethnicity or political beliefs, and typically under harsh conditions. In contrast, a prison is a legal institution where individuals are held after being convicted of a crime, following a judicial process.
My feeling based on the terseness of your reply is that you don't really want to support what you had said initially because there's no real difference or distinction to be made between a concentration camp, and a torture prison.
