Hi Kevinmay,
Yes … SleepEz has mattresses that use the same types, blend, and quality of latex as the latex used in the Savvy Rest and have the same design (two, three, or four 3" layers of latex inside a zip cover) although SleepEz offers other designs as well. They also have an organic wool quilted zip cover that is similar although there may be some differences between them in terms of the amount of wool or the thickness or the specifics of the organic fabric.
How you tell is to compare apples to apples based on the type of latex in each and on the type of cover and quilting (which would need a conversation with each manufacturer).
The only other difference would be the firmness level of each layer of latex and in this the choices would be similar as well. One of SleepEz’s Talalay latex suppliers is the same as Savvy Rest (Radium) and they also can provide Talalay latex made by Latex International as well. SleepEz also offers 100% natural Dunlop as well as organic Dunlop that is very similar in quality to the Dunlop used by Savvy Rest although their suppliers may be different (Savvy Rest uses CoCo Latex and SleepEz uses Latex Green for their Dunlop).
A conversation with SleepEz will also go a long way towards answering your questions at the level of detail that is important to you (including letting them know the specific layering that you preferred in the Savvy Rest mattress) so you can make a final choice that is best for you.
Phoenix