If they're different mechanical representations of the same creature, then it's broken. A ten year old with a rock will kill the minion in 1 round 5% of the time, but has no chance against the ogre with 111 hit points. 5% of the time the ten year old dies to an ogre with 110 hit points.
That's either not the same ogre, or it's two different mechanically broken representations.
Only if your goal is to strictly simulate the physicality of the ogre (and other monsters).
If you are trying to represent the narrative role of the ogre, then it can have different representations depending on the narrative state in which you encounter it.
I suggest to you that the moment when a single ten-year-old human child faces down an ogre, the narrative role of that ogre is probably not "minion", so the encounter you are envisioning should never take place.
Bringing up 10-year-ols should be a clue that you're barking up a strange tree, since D&D is not centered on 10-year-olds without PC class levels. Monster stat blocks are designed for pitting against a PC in play, not for pitting against children in theorycrafting.
Your discussion will go to weird places when your argument is based on using game elements for things they weren't really designed to do. Talking about using ogre statblocks against 10-year-old commoners is kind of like talking about using a hammer to drive a screw. You can do it, but it doesn't tell you much about the typical reality of building a backyard deck.