The scanning was already a problem. A lesser one, as not using Google or iCloud avoided it. Now I can't, because technically Apple can now look directly at the phone. No idea hey it is so hard to get that difference.
The feature what everyone is afraid of (scan all in my device), is super trivial to add generally. Company like Apple can push it to public in less like week regardless if this Child Safety came first.
This new feature is actually really hard to develop, because they try to create E2EE system with backdoor. And they want to lock themselves out of this backdoor to prevent misuse.
There is no difference.