Hi knculver,
You may have some better options than you realize in Oklahoma City including one of the recommended members of this site which are among the best quality/value available in the country. they are listed in post #2 here.
Unfortunately neither of the mattresses you are mentioning include the most important information which is the density/quality of the polyfoam layers that they use so there is really no way to make any meaningful comparisons with other mattresses. Since the odds are good that both of them use lower density polyfoam (1.5 lbs or less) … I wouldn’t consider either of them until I could confirm the quality of the materials and any possible weak links in the mattress.
Of course it is just as important to make sure that any mattress … regardless of the quality of the materials … is suitable for your needs and preferences (you can’t “feel” quality) and better retailers and factory direct manufacturers will also have the experience and knowledge to help you make choices that best fit your body type, sleeping style, and preferences as well in a mattress that fits your budget and has the best possible quality and durability that is available in your budget range. Both of these mattresses have some very thick layers of what is almost certainly low quality polyfoam in the comfort layers that will soften and degrade much more quickly than higher quality materials.
Some of the manufacturers of Lady Americana mattresses are better than others at providing this information to their retailers but either way a better retailer will understand the importance of providing this information to the customers who want to know and they should track these specs down for you. Trying to find them with your own research is both time consuming and frustrating because it is often fruitless and it is the job of the retailer anyway.
Phoenix