Yes, I believe they will. So far a marine biologist I know in California (working on us Doctorate... maybe has it by now) has done some looking into it and he is pretty sure they are the same species. I don't know of anybody, anywhere in the world that has done the DNA analysis of both to compare. And just to muddy the water up (so to speak) there are RFAs that come from water that is only semi deep and they are also semi-colorful. Usually only one color and nothing like the ultras, but absolutely more color than the very ordinary shallow water relatives.
These are very typical of the very shallow water RFAs we find in less than 3 or 4 feet of water on the Florida Bay side of the Middle Keys. Some have VERY cool patterns, but only a very few have any color other than white, tan, brown and black. A few have green tentacles and they do fluoresce.