There is a big difference between the two.

 Infants are not fully grown, so even though most of the surgical incidentes have been eliminated in routine neonatal circumcision, each child matures at a different rate. I ended up not having enough shaft skin so my scrotum skin got pulled up onto my shaft and my balls got pulled up into  pockets in my groins making sex/erections painful. They also cut my frenulum nerves to make the scar look even. These nerves are the ones that give you that enhanced sexual pleasure when they are pulled, and they trigger erections as they run to the reproductive parts of the brain.  With the knowledge of the function of these nerves, a person can have control of a person's or a society's breeding ability.

 As you were fully formed, neuro/chemically, hormonally and mentally when you elected to have it done to you, your brain chemistry didn't change much, accept you are allways sexually aroused now. They probably left your frenulum intact, thats why you experience no dysfunctions. Your balls got to form in a normal scotum with no stress from a shortened shaft skin.

 FredR