Hi Maxsxpower,
Your question may be much more complex than you may realize 
I don’t keep a record of the individual mattresses that the retailers and manufacturers in the hundreds of forum lists throughout the forum carry on their floor (it would be a bigger job than anyone could keep up with in a constantly changing market) so you would need to check their websites and make some phone calls to the retailers/manufacturers that are on the forum lists that are in reasonable driving distance to find out if any of them carry a similar two sided Talalay latex mattress (although two sided Talalay latex mattresses are fairly uncommon so it’s unlikely that you will find any others in your area).
There is more information in post #9 here about the different ways that one mattress can “match” or “approximate” another one. Every layer and component in a mattress (including the cover) will affect the feel and performance of every other layer and component and the mattress “as a whole” so unless you are able to find another mattress that uses exactly the same type of materials, components, cover, layer thicknesses, layer firmnesses, and overall design (which would be very unlikely) then there really isn’t a way to match one mattress to another one in terms of “comfort” and PPP (Posture and alignment, Pressure relief, and Personal preferences) based on the specifications of the mattress.
Mattress manufacturers generally try to differentiate their mattress from the mattresses made by other manufacturers and don’t normally try to “match” another mattress that is made by a different manufacturer so while you may find similar mattresses that use “similar” materials or designs or other mattresses that contain the same amount of Talalay latex in lower budget ranges (most likely one sided) … it’s very unlikely that you will find another mattress that is specifically designed or that just “happens” to “match” or “approximate” the mattresses you mentioned in terms of PPP so the only way to know how two mattresses compare for you in terms of how it “feels” or in terms of firmness or PPP would be based on your own careful testing or actual sleeping experience on both of them.
Of course that doesn’t mean that another mattress that contains a similar amount of latex with a similar cover also won’t be a good match for you in terms of PPP … just that it would probably be different and that you won’t know how it compares until you actually test it or sleep on it in person.
There also isn’t a formula that you can use to assess value because there are so many different variables that are more or less important to different people and because the “value” of a mattress purchase is relative to how it compares to the other finalists that you are considering or to other mattresses that are available to you either locally or online but there is also more about the 3 most important parts of “value” of a mattress purchase in post #13 here which can help you make more meaningful quality/value comparisons between mattresses in terms of suitability (how well you will sleep), durability (how long you will sleep well), and the overall value of a mattress compared to your other finalists based on suitability, durability, and all the other parts of your personal value equation that are most important to you (including the price of course and the options you have available after a purchase).
Off the top of my head there is another online two sided Talalay latex mattress here that is made by one of the members of the site that is “somewhat similar” that you can use as a “value” reference (although it uses 100% natural Talalay and I believe that the mattresses you are looking at use blended Talalay latex) but it is in a similar price range and I think that the list prices of the mattresses you are looking at are certainly fair (although it never hurts to ask if they can provide you with an additional discount).
I know that this was a long answer to a short question but hopefully it also answered all the other questions that were “hidden” inside the ones you asked.
Phoenix