Real talk before dutret comes in and says the same thing I'm about to say:

Ceramic BB's are saving you a handful of watts at best. That's nothing compared to what a proper bike fit or proper handlebar setup / riding technique will save you. If anything, ceramic is better in the hubs because they spin at higher RPMs but it's still making a very marginal difference that you'd have to be time-trialing to notice. Save the money and buy nicer tires, you'll notice a lot more difference.