I bought a boat that had a beautiful, brand new black Awlgrip paint
job. Sailed and lived aboard for several years in FL, Bahamas
and VI. After some idiot tied a dinghy
to my stern at crowded dock
and trashed the paint
on the stern I repainted it white. The difference was huge. I left one black stripe alone the rub rail and I could feel inside the boat on a sunny day exactly where the white turned to black. It was like a radiant heater along the black part.
So yes, direct personal experience. Plus the exact same boat going from black to white so no variables as far as hull
For me, never have anything except white, especially for FL or tropics.