I had JB and now MB, but have a Gold iPad Pro 9.7, for me i get what is cheapest when needed as i usually swap often so don't pay retail. New 7 Plus 256GB MB $950 retail $1569. iPad Pro 9.7 $680 retail $1049. AUD.
If you use cases on your phone I'd go more by whether you'd rather have a white glass face or black. You'll see that much more than the phone color if you cover it with a case.
I personally don't like white glass fronts very much. I think they're kind of gaudy, but that's my opinion. A ton of people love white fronts. I also personally hate yellow/rose gold anything. So when I buy phones they're almost always black. This second part is completely subjective though.