This is about as dumb a reason to scar your poor children as I can imagine. Don't let them choose! Quick cut them at birth so they don't have to wonder (!) why they look a little different from daddy. If you don't want them to wonder, tell them. "There was no reason to cut your penises, so we left you as nature intended. My parents made the mistake of cutting me when I was a baby."
You wanted to keep it "uniform?" Since when is a penis in the army?