Since you asked the question, I’ll give what I think is the obvious answer: yes, of course it’s far worse than both of those things. By the way, I wouldn’t pierce a baby’s ears either, but at least that heals over and leaves minimal lasting damage. You can’t get foreskin back once it’s gone. This might be no big deal to someone who doesn’t know what they’re missing, but try applying that standard to any other part of the body.
What is the downside of leaving it until the age of 18 when they can decide to get it done if they want?