Hi stargazy,
The Brooklyn Bedding Ultimate dreams is actually a latex/polyfoam hybrid and is different from an all latex mattress. In other words they are not an apples to apples comparison and you can read more about some of the differences between a latex hybrid and an all latex mattress in post #2 here.
The Phoenix area has some of the best options in the country in terms of latex (including several of the members here) and just in case you haven’t seen them (of for others from the area that may read this thread) they are listed in post #4 here.
In terms of what to look for, it would be the basics which means testing for pressure relief, testing for alignment, and testing for your preferences and then making apples to apples comparisons between your options based on all the objective, subjective, and intangible things involved in any mattress purchase that are more or less important to you based on your personal value equation. You are making choices between options that all have great quality, value, and service in other words and the way to choose between them would be about your preferences rather than thinking in “better worse” terms.
You have local access to some of the best manufacturers in the country who have many years of knowledge and experience in helping their customers make the best possible choices so I would also use this to your benefit. There is very little I could say that they won’t already know and be able to help you with. I would also put a great deal of importance in your personal experiences in testing mattresses, particularly when you have such great quality and value available locally, rather than taking on the potential “risk” of an online purchase unless there were very compelling reasons for you to do otherwise.
Phoenix