Hi bbandc,
Dreamfoam and Brooklyn Bedding are sister companies that each sell different mattresses although there is some overlap between them (such as the Total Latex mattress). There is more about each of them and how they compare in general in post #4 here and in post #3 here.
Post #4 here and the posts it links to has more information about the many factors that can affect the durability and useful life of a mattress relative to each person. The density of the base layer will have less effect with lower weights than it would for someone that was in a higher weight range but there isn’t any way to know exactly how many years a specific mattress will maintain its comfort and/or support for any specific person outside of saying “this one will likely last longer than that one” (see post #6 here and post #36 here).
All of the mattresses you are considering are great quality/value in their budget range but there are a few differences between them that may make a difference in deciding which one is the best choice for you (regardless of whether it may be the best choice for someone else) based on the parts of your personal value equation that are most important to you.
The Eurotop and the Cotton Camilla both have a cover that is quilted with polyfoam while the Bamboo Bliss also has wool in the quilting which can help with temperature regulation and is a more costly material.
The Eurotop and the Cotton Camilla both use 1.5 lb density polyfoam in the support core and the Bamboo Bliss uses the higher density 2.17 lb polyfoam so while it may be less important for you than it would for someone that was heavier (around the low 200’s or higher), it would still make “some” difference.
The Cotton Camilla also has fewer firmness options than either the Eurotop or the Bamboo Bliss.
The Brooklyn Bedding mattresses also have a more liberal exchange policy than the Dreamfoam mattresses.
The Eurotop cover can’t be washed or cleaned while the Bamboo Bliss can (see post #39 here).
Phoenix