I used to fly from Monterrey, MX to Miami then Puerto Rico.
The different dialects (Norteno, Cubano, PR) are vividly different. It got to the point I could imitate all 3 pretty well and used to entertain the folks at the AA lounge in Miami doing them.
I can tell you PR Spanish is the worst. It is guttural and they chop 1/3 of the words out. And they have NO INDOOR VOICE! EVERYTHING IS YELLED!!
Forty years in Miami tells me Cuban Spanish means the speaker is VERY IMPORTANT, and is YELLED in stores, on phones outdoors, and everywhere else. The contrast to the many quiet Mexican-Spanish speakers here in Florida's Heartland couldn't be greater.
Buena' Dia'. ;)