Well it seems you have narrowed your search down a bit, very nice job. You are on your way!
Zoned coils are coils that provide different levels of support for different parts of the body, helping to keep the spine aligned and relieve pressure points. Do you need them? Maybe, maybe not. They certainly have their functionality and work to relieve pressure areas and keep you in alignment.
I look at it this way as you mention should someone petite like yourself need them. My opinion is, what would it matter what size you are. For example, if someone 250lbs wants a firm mattress, they may not pick the same exact firm mattress as you would at 115lbs or vice versa. Imagine you picked a mattress that had a comfort layer with an ILD of 19. You lay on it and immediately you say, eh, this is way too firm for me. Anyone looking at the specs would say, what, that mattress is leaning towards the medium to medium soft side. But you are 115lbs so it seems firm to you. If someone like myself or that 250lb person lies on it, you might see his body sinking into the mattress because…to him it seems way too soft, he may be happier in a 36 to 44 ILD in order to lay flat on top of the mattress.
Zoned coils are there to support different areas of the body respectively based on your PPP’s and comfort levels. Perhaps the bottom area has a bit more padding and you have had mattresses sag in that area previously. Perhaps it may have been too soft of a comfort layer, not enough support from your none zoned support layer or a combination of both. We could talk about all the technical aspects of zoning, but at it’s most basic level, this is it.
So, when I was looking for a new mattress, one of my requirements was it had to be flippable. Why? I am not quite sure. Well, I was, I am just not quite certain my logic was correct. Hopefully when @Arizona_Premium or @Spindle_Mattress chime in, they will rescue me. In any case, I thought I was getting more mattress for my money. None of the mattresses that were two sided cost twice as much. To me, what a bargain, if one side wears out, I can just flip it and get another ### of years, for less that twice the price, way less, seems like a bargain to me. The other thing for me was. I think the concept of my spring layer in the middle surrounded by my comfort layer on both sides, with quilted cover/panel layers on both sides, seemed like it would produce a sturdier more durable mattress, provided those layers were better quality. That logic made sense in my mind. Single sided mattresses although very popular these days and when quality materials are used, can be quite good, but only as good as one side of my two sided mattress. Seems like a win for the mattress company, not me the end user. Kind of like the Wendy’s Commercial “Wheres the Beef?” (if you are too young to know that commercial here it is Where’s the Beef Where is the other side of my mattress that was always there when I was a kid growing up.
Now as for which mattress to choose? Coke or Pepsi, oops wrong commercial, @Spindle_Mattress, @Arizona_Premium, @Sleep_EZ or @Latex_Mattress_Fact1 . All of these manufacturers are here because they offer the best quality materials, service, advice and reputation for being transparent about what they sell. They are real folks who have to deal with you as a consumer face to face if their advice fails to meet your expectations and they will aim to please when, on the slim chance it isn’t perfect the first time around, they are all the types that will work with you to make it right.
Are there more companies out there that you missed. Yep! Do you want to drive yourself to exhaustion? I doubt it. You could probably continue down the list of Trusted Members here at TMU and keep spinning those wheels.
I am sure you would be happy and comfortable with most any of our TM’s. You have to do what is best for you and listen to what each has to say, how they say it, and who you feel most comfortable with in the end.
Lets see how that will work itself out.