Hi ImTired,
You’re welcome! 
The core is available in “medium” or “firm”. Here is the link to the Sleeptek web site explaining this about the Euro 4 mattress.
Both of these choices would be very different in configuration to what you tested, so I wouldn’t have an ability to surmise which one would be preferred or close to what you liked at the Sleeptek store.
The uppermost layers (closest to your body) will have the greatest impact upon your comfort. Wool has a very different feel from latex, so drawing comparisons would be difficult, and as a practical matter, futile. I would really call these three different products with different resultant comforts. The Dormio Refresh you mentioned has an overall amount of latex closer to the Sleeptek you mentioned, so it would be the closest in the overall amount of similar “material”, but even if you were using the exact same two bottom layers, the addition of the wool would certainly change the feel. There’s a bit more about wool as a top layer in post #8 here.
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 and any quilting materials) 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 and quilting, layer thicknesses, layer firmnesses, and overall design (which would be fairly unlikely) then there really isn’t a reliable way to match one mattress to another one in terms of “comfort”, firmness, and PPP (Posture and alignment, Pressure relief, and your Personal preferences) based on the specifications of the mattresses (even assuming that you can find out all the specifications you would need for both mattresses you are comparing in the first place).
The first “rule” of mattress shopping is to always remember that you are the only one that can feel what you feel on a mattress (your opinion is paramount) and there are too many unknowns, variables, and personal preferences involved that are unique to each person to use a formula or for anyone to be able to predict or make a specific suggestion or recommendation about which mattress or combination of materials and components or which type of mattress would be the best “match” for you in terms of “comfort” or PPP (Posture and alignment, Pressure relief, and Personal preferences) or how a mattress will “feel” to you or compare to another mattress based on specs (either yours or a mattress) or “theory at a distance” that can possibly be more accurate than your own careful testing (hopefully using the testing guidelines in step 4 of the tutorial) or if you can’t test a mattress in person then your own personal sleeping experience (see post #2 here).
When you can’t test a mattress in person then the most reliable source of guidance is always a more detailed phone conversation with a knowledgeable and experienced retailer or manufacturer that has your best interests at heart who can help “talk you through” the specifics of their mattresses and the properties and “feel” of the materials they are using (fast or slow response, resilience, firmness etc.) and the options they have available that may be the best “match” for you based on the information you provide them, any local testing you have done or mattresses you have slept on and liked or other mattresses you are considering that they are familiar with, and the “averages” of other customers that are similar to you. They will know more about “matching” their specific mattress designs to different body types, sleeping positions, and preferences (or to other mattresses that they are familiar with) than anyone else. A phone call with Unison and Dormio would be helpful. Tell them exactly what you tried and liked, and they’ll use the knowledge of their products to do their best to approximate something that is a close match, or at least as close as they are able to provide.
Thanks!
Phoenix