A fluorescent corn has been line bred to exaggerate the oranges in an amel. Whereas most of your R.O.'s have been line bred to exaggerate a clean white border around the saddles, similar to the black saddles you find in an normal okeetee. However, a reverse okeetee is an amelanistic snake that has been selectively bred to
resemble an okeetee, but normally doesn't contain any okeetee bloodline.
After looking at the photos on Ians Viv., I can see where your question came from. The photo of an R.O. and a fluorescent look like they could be the same snake. My R.O. has a quite a bit of white blended in with orange in her background color... which is quite common for a R.O. Her background color should darken just a little more, she's a little over two years old now. Check out the variance in R.O.'s on Don Soderberg's photo gallery...
http://cornsnakes.net/photogalleryhr.php Go to: okeetee (reverse)