A:Answer No, the Samsung Galaxy Prevail is a different model. That's an entry-level phone, with a smaller screen, less RAM, and less internal memory.
The Samsung Galaxy J7 is a mid-range phone, and many of its features are similar to Samsung's top-of-the-line "S6/S7" phones.
Incidentally, I have experience with both phones. My Dad has the Prevail (I helped him set it up), and I have the J7. Both are Samsung products, both run on the Boost Mobile network, and both were purchased at Best Buy. And they're both good phones (we're very happy with them).. But they are QUITE different in size, appearance and performance.