Sne an email to the place BEFORE I remembered I can just ask here and get a quicker reply.
Here is what they had to say:
The menus are not the same in both restaurants, although they do have some items in common. Smokey Joe's is more of a BBQ restaurant with many varieties of ribs, as well as grilled fish, while Iguana Joe's has a more extensive Caribbean themed menu. We also recently opened a third restaurant called Iguana Cantina, located across from the Holiday Inn hotel which is a Mexican restaurant. Our menus can all be found online on our websites.
Aruba Joe's NV
I will mention that the IquanaCantina has all you can eat fajitas (steak or chicken) on Wednesdays for 18.95 per person