Hi lovingthbay,
The 13" Ultimate dreams is a little firmer than the Cloud Luxe and probably a little softer than the Supreme. There have been several people say it’s “in between” although of course this is somewhat subjective.
Several of the manufacturers or retailers listed in the post I linked for online memory foam suppliers (post #15 here) are quite familiar with the Tempurpedic line and how their mattresses would compare to the various models in the lineup because it’s so widespread and easily available. In many cases … even if they don’t have specific comparisons on their site … I would call them to ask which model they make would best compare in their opinion to the Tempurpedic model you prefer. Some of them make some very direct comparisons as well and one of them not only matches the “feel” of each Tempurpedic mattress but is also very similar to the specific layering and foam densities (or better) as well.
Phoenix