The simple one, not blue. I don't have hands on experience with white car so can't say really.
You might want to try synthetic polymer based wax instead of carnauba. White paint has the chance of yellowing over time so you need to have some sort of protective UV layer which you can after some time remove to reveal the white.
With Carnauba bases waxes, most likely the added oils and solvents give the paint sort of hue. White cars are not about reflections to be clear, they are about the form.
Example: See this picture.
White: It's about the form, the design lines, contours, the idea is to emphasize the true design of the product.
Black: Adds personality and reflections at the cost of hiding the form of the product. It looks great but needs great care and maintenance to stay like that.
Most people, while trying to detail a white car, start chasing the idea of getting glossiness and reflections. But really they should be more concerned about the contamination of paint and UV protection. The cleaner and more uniform the white paint is, the more beautiful a car will look.
Matte white looks awesome!
