I can rank them in different ways. First off, Ranier is a decent bullet but I place it solidly behind both Berry's and Xtreme. I have always found Ranier's plating to be thinner. It's a fine plated slug but well behind the other two.
Berry's was my absolute GO-TO choice for many years until Xtreme came along. I find that they produce a fantastic product and their customer service has always been top-notch.
I switched to Xtreme a couple of years ago. This is simply because Xtreme seems to offer a bullet that is every bit as good or better, and they tend to be cheaper as I shop. Xtreme bullets are (by far, not even close) the absolute shiniest, awe-inspiring glittering bright bullets in the history of the Earth.
Xtreme's customer service isn't bad, but it trails Berry's. They do some annoying things with their sales and "hints" at sales on their FB page and website that has grown tiring to me, but I still love their slugs.
For me, it's mostly Xtreme but I will always love and recommend Berry's also. I have no need to shop for any other plated bullet, including Ranier.