You can clearly see the exquisite grain on white in any light. You'd have to look at the black at an oblique angle to catch the grain. BTW white *is* easy to keep clean...just a few wipes here and there with leather cleaner/conditioner (I use Coach brand) if you rub it against something dirty. Beware of pens...that is said for all bags, even black.
If you have the $$, get both. I love the white Suhali so much I have the L'epanoui AND the Le Fab. Why not? Go with what you love!