Hi paisley,
There are a few I’ve seen in my travels from time to time and also some articles about how to compare some major brands by coil count or type, comfort layers, or their letter level (in the case of Sealy) and a google search that includes the name of the manufacturer and “model name comparison” would likely find some of them but your question itself indicates that you may already be going in the direction of the major brands who follow these types of deceptive practices and which are among the mattresses I would avoid completely.
A mattress is only as good as the quality of the construction and materials it uses inside it and the major brands won’t disclose this to consumers for the most part . In addition to this if you happen do some exhaustive online research or have some inside information where you can find out some of this information then you will find that in every price range they use lower quality materials and sell for higher prices than most smaller independent manufacturers that are either sold factory direct or through better sleep shops. Anyone who tries to tell you that a mattress has “good quality” that can’t provide the quality specs of the mattress to validate their “story” has no idea of the quality or value of what they are selling and in these cases “quality” or “value” is just a meaningless word.
The first place I would start if you are looking for a new mattress is post #1 here which has all the basic information , steps, and guidelines you will need to make the best possible choices.
Phoenix