Hi boar_d_laze,
There is more about the different ways that one mattress can “match” another one in post #9 here but unless a manufacturer or retailer includes a specific comparison with another mattress in the description or is personally familiar with how one of their mattresses compares with another one that you are considering the only way to know whether another mattress would be similar in terms of PPP would be based on your own personal testing or experience.
In terms of the quality of the materials then any mattress that uses similar quality/density materials would compare well in terms of durability but quality specs won’t tell you anything about how a mattress feels and performs.
There is more about the most important parts of the “value” of a mattress purchase in post #13 here that can help you decide whether any mattress is “worth it” compared to any other mattresses you are considering but in the end it will really be up to you to decide whether the potential benefits of researching and testing other mattresses that are available in your area (or online) would be worth the potential cost savings or the additional time and effort it would take to find and test them.
The Copia certainly uses high quality materials and there are no weak links in the design or any of the materials so it would certainly be a durable choice. If you are in doubt about whether it would be the best “value” in your circumstances then it may be worth adding one or two additional finalists to the options you are considering so that you will have a better reference point that would be helpful in deciding whether the additional cost is “worth it” to you based on all the parts of your personal value equation that are most important to you. It would certainly be a better quality/value choice than most of the mainstream mattresses that most people who buy a new mattress would normally end up purchasing.
If you do decide to broaden your search then the better options and possibilities I’m aware of in the Los Angeles area are listed in post #2 here (just in case you haven’t seen it yet).
Phoenix