Hi Yoksel,
Innersprings are just as valid a choice for a support system as any other support material or component. Regardless of which support system you choose or prefer … it’s usually the materials in the comfort layers above them that are the weak link of a mattress. I would also keep in mind that any mattress category has a huge variety of different mattresses that have a very different feel and performance so sometimes assessing an entire category of mattresses based on a single mattress can be misleading and could result in bypassing the specific mattress that may work best for you.
Unfortunately neither Simmons or the Sheraton discloses the specifics of the materials in their mattresses so it really isn’t possible to approximate it except based on your own personal testing and your subjective memory of what it felt like when you slept on it (which like most subjective comparisons over time isn’t usually particularly accurate). In most cases … hotel mattresses use lower quality materials in their comfort layers than many other choices most people have available and are not particularly good value. They are a purchase that many people regret making (see post #3 here).
As you can see in the mattress shopping guidelines linked in post #1 here, I would also avoid the major brands or any mattress where you aren’t able to find out the quality of the materials inside it.
The W Hotel mattresses are are also made by Simmons.
Phoenix