Arcángel, the Puerto Rican reggaetón voice, spends "Diferente" wishing a secret romance could come out into the open. The hook says it plainly: "Y yo quisiera que fuera diferente, podernos besar frente a la gente" (And I wish it were different, to be able to kiss in front of people). He wants her world to revolve around him "como el mío lo hace por ti" (the way mine does for you), so this is a guy who is already all in and tired of hiding.
The verses keep asking why they have to sneak around at all: "Si Dios nos hizo para que nos abracemos" (If God made us so we would hug each other). He gets cheeky too, offering to "navegar en tu universo" (sail through your universe) like a comet, and claiming a spot for her on his spaceship because she alone "tienes la llave" (have the key). Watch for "obligao'", a clipped Caribbean way of saying obligado (obliged, of course), and "sacarnos jugo", literally "squeeze the juice out of each other", a flirty way of saying they should make the most of each other. By the end he is promising "poco a poco vamos encaminando" (little by little we are heading somewhere), toward love.