Hi KingSpore,
That’s certainly the first step involved in comparing an online mattress to one you have tested in person. The first part of comparing mattresses is PPP (Posture and alignment, Pressure relief, and Personal preferences) which is about what you feel on a mattress. The rest of the comparison would be based on the quality of the materials. If you are confident that the Tempurpedic Cloud is a good “match” for you in terms of PPP then it certainly makes sense to compare online mattresses that are similar in terms of PPP and the other parts of your personal value equation that are most important to you. There is more about “matching” one mattress to another in post #9 here that you can also use as a reference.
Most of the feedback about the Dreamfoam 13" memory foam mattress indicates that it has a very similar “feel” to the Tempurpedic Cloud Luxe except perhaps just a little bit firmer although of course different people may have different thoughts and opinions about how two mattresses compare.
Phoenix