Of course it's different. Circumcision, by nearly all reputable medical testimony, has negligible negative effects on sensation and function of the penis, and if anything may have some minor positive effects in prevention of fungal and bacterial infections of the penis, disease transmission, and reduction in penile cancer. There is little reliable evidence that circumcision, if properly done, is any more painful than getting injections, or any number of other medical tests and procedures we all regularly have done to our children.