Yes ... they're all the same beach.
If I remember the order correctly, when you're driving south you'll first come to Paradise, next is Sanchos, and finally Nachi.
The major difference between them all is what they offer. If you want a beach-centered amusement park, that'd be Sanchos. If you want a private resort feel, that'd be Nachi. If you want the inexpensive mass-produced, that'd be Paradise.
SIG: If you're going to create the drama, at least supply the popcorn.