I don't get this.None of which changes the fact that they have different entries in the book and different stat blocks. It's kind of like saying that a 5E guard is the same as a champion because they're both human.
Imagine Gygax's game back in the 1970s. A 9th level fighter leads an army. If that fighter PC gets into a fight with one of their mercenaries, we resolve the fight using the Book 1 combat system or (once it's published) the AD&D system: attack matrices, AC, hp etc.
But if the whole army rises up against the fighter, and it becomes like Conan wading through a horde of opponents, that is not going to be resolved the same way. To resolve that sort of fight you use Chainmail (or maybe Swords & Spells?), with the fighter represented as a Superhero and the mercenaries having their own Chainmail-esque mechanical representation.
No one thinks that this difference of mechanical representation and resolution means anything has changed in the fiction. It's something that happens at the table to achieve the desired game play.
In 4e D&D, the mechanical representation of a hostile Ogre (or Orc, or whatever) is changed, depending on the context in which it is being fought. If it is being fought by one or more PCs who are considerably weaker than it, we represent it as a Solo or around about their level. If it is being fought by PCs who are more-or-less a match for it we represent it as an Elite or a Standard of around about their level (there is obviously some room to move here, corresponding roughly to how much more or less). If it is being fought by PCs who are more than a match for it, we represent it as a Minion. And if it is part of a horde of Ogres being cut through by a Beowulf-like Ogre-slayer, we can stat up an Ogre swarm.
The entries in the Monster Manual, with their corresponding stat blocks, are not like entries in Gould's guide to birds: they are not an imagined naturalist's account of different creatures she once encountered. Those entries are game-play tools, providing us with a range of different mechanical representations of an ogre to perform the various tasks described in the previous paragraph. For whatever reason, a particular RPGer may prefer their Monster Manual and its stats to be amenable to treatment, in imagination, as a fictional naturalist's handbook. I don't really get it - why would a naturalist, even an imaginary one, use purely gameplay notions like hit points and damage dice? - but whatever floats your boat!
But having a particular preference doesn't justify reading a work written to satisfy a different preference in a distorted fashion!
EDIT: Mostly ninja'd by @bert1001 fka bert1000 in post 356.