The difference between Despacito original and Despacito featuring Justin Bieber.

The original it ai, fonsi (Which is the name of the featuring in the original) and says oh no

Si
Yo ves unpocito mirandote
Yo quiero a bailar con teigo oy

I was looking at you for a little while
I wanted to dance with you today

And the Puerto Rico part in Spanish it says

We are gonna be in a beech in Puerto Rico