In looking over the two diamonds, they are honestly along the same lines when it comes to the cut aspect and overall proportions. Now, the fluorescence in my opinion is something that will help the overall color appear slightly whiter than one without. With that said, it will also depend on the rating of fluorescence, faint or medium could help just slightly, if at all. The real difference to review, fluorescence aside, would be the clarity ratings and price points. Which one works best for your budget. Secondly, review the company policies and which one works there for you as wellAfter all, you must feel good about the entire process and what you end up with on paper
Good luck on your searching, they are both great selections, you can't go wrong!