I've never seen santorini but I saw frozen MCB and was really disappointed. It just kills the colour and looks strange on the road (btw I have a shiny MCB on order so I love the colour).
I do like frozen white and santorini in pictures. For what it's worth I chose MCB then debated and changed my mind 100 times but still stuck with it.
Pretty happy I did although yet to receive the car so don't want to speak too soon.