"Is my dude wearing Power Armor?"
"Yeah dude, he is."
"Okay, it's legal."
"Is my dude wearing Power Armor?"
"Well dude... It says that he's got Artificer Armor on."
"Well I read somewhere that Artificer Armor IS Power Armor. Hahaha!"
"Bro... Power Armor is Power Armor, Artificer Armor is Artificer Armor."
"Is my dude wearing Power Armor?"
"Dude, that's a Rhino."
"Yeah, true. Lololololol."
I dunno... It seems SO simple to me...
I get why the Artificer Armor question comes up. It's not a bad question. I'm not writing a rulebook here, I'm trying to communicate the obvious intent. Please don't over complicate it.