there many ways to find out. the copycat doesnt know anything about actual azul so anything can really work.

you can do the following

ask about the plague [ sosorry asked ]

ask about azuls strange obsession of consuming barstools like a snake [glitch asked this ]

play mr blue sky on any device. the real azul will assault the fake one with no hesitation

ask about any where abouts of gee.

ask both to recite all names of their ST group

whats their therapy 'dog'

and theres more if you think hard enough