Hi EZ4HZ,
The Dreamfoam mattresses and the Christeli mattresses you are probably looking at are memory foam mattresses (memory foam over a polyfoam support core) and the Charles P Rogers mattresses are innerspring mattresses (different types of foam and padding over a pocket coil) so they are completely different types of mattresses that use different materials and components. Comparing them would be like asking whether an apple is better than an orange and each person will have their own preferences. The choice between different types of mattresses is always a preference choice and would depend on which type of mattresses your testing indicates you tend to prefer.
Having said that … there is more about the most important parts of the value of a mattress purchase in post #13 here that can help you make more meaningful comparisons even between different types of mattresses.
The most important part of “value” is how well a mattress matches your unique needs and preferences in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) which will determine how well you will sleep on the mattress.
Outside of PPP … the next most important part of the “value” of a mattress purchase is the quality and durability of the materials inside the mattress. This will tell you how long you are likely to sleep well on a mattress relative to another one before you cross the thresholds from sleeping well to sleeping OK to “tolerating” a mattress to finally deciding to replace it. Since you can’t “feel” the quality of the materials in a mattress (lower quality and less durable materials can feel the same as higher quality and more durable materials when they are new … they just won’t last as long), the only way to know whether a mattress has any obvious weak links in terms of durability is to find out the specifics of all the materials and components in the mattress (see this article).
If Charles P Rogers will provide you with this information then you would have what you need to make an informed choice about their mattresses and to make more meaningful comparisons to other mattresses. Unfortunately they told me that they don’t provide this information to their customers (see post #34 here and the rest of the topic) and without this you would be making a blind purchase in terms of knowing the quality and durability of the materials in the mattress and you wouldn’t be able to make meaningful comparisons with other mattresses.
If in spite of what they told me they are willing to provide you with this information then you can compare it to the guidelines here or if you post it on the forum then I’d be happy to make some comments about the quality of the materials inside it and help you identify any potential weak links in the mattress.
The process of comparing mattress really comes down to testing for suitability (PPP), checking for the quality of the materials (durability), and comparing with your other finalists based on all your preferences and on the other parts of your personal value equation that are most important to you.
Its only possible to do this with a retailer or manufacturer that is transparent and open about the quality of all the materials in their mattresses … particularly the comfort layers which are generally the weakest link of a mattress.
Phoenix