Hi cassy13,
Unfortunately there is no way to know which mattress would “feel” comparable to you or would be comparable in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) outside of your own personal testing and experience. There are too many unknowns, variables, and personal preferences involved for anyone to be able to predict how any mattress will “feel” for you or how it will compare to another mattress based on “specs” or “theory at a distance” (see mattress firmness/comfort levels in post #2 here).
There is also more in post #13 here about the most important parts of the “value” of a mattress purchase that you can use to compare different mattresses in terms of suitability (PPP), durability, and value based on the parts of your personal value equation that are most important to you but since Sealy isn’t transparent about the type or quality of the materials they use there really isn’t any way to make meaningful comparisons with other mattresses. In most cases … I would tend to avoid the major manufacturers or any mattress that uses too much lower quality or unknown materials relative to their price range (see the guidelines here) and this isn’t a mattress that I would use as a “target” to find something comparable because the bar you are setting is much too low.
The best way to find a mattress that is the best “match” for you in terms or suitability, quality/durability, and value is to follow the steps in the mattress shopping tutorial one at a time which has all the basic information, steps, and guidelines that you will need to make the best possible choice … and know how and why to avoid the worst ones.
Once you are at step 3 … if you let me know your city or zip code I’d be happy to let you know about the better options or possibilities I’m aware of in your area.
In most cases … the knowledge, experience, and transparency of the retailer or manufacturer that you choose to deal with can be one of the most important parts of a successful mattress purchase.
Phoenix