Hi jkozlow3,
Thanks for sharing your experiences and insights … I appreciate it.
I think many people would notice a difference because as you discovered the extra thickness can make a significant difference in how a mattress feels, its “range” of compression, and how it adapts to the body (see post #14 here). If all the other factors are equal … thicker mattresses will feel softer.
The two designs are very different so it really isn’t possible to compare how they would feel for a specific person but they have much more knowledge and experience with “matching” their mattresses to different body types and preferences than anyone else (including me) so when you are choosing a mattress online that you can’t test ahead of time I would always base your comfort choices on a more detailed conversation with the manufacturer (that includes your testing experience as well). The advantage of a component mattress is that your first combination doesn’t have to be your last because you can either re-arrange or exchange layers so your initial combination is just part of the process. While you may not need it … and the first combination is usually the one that most people keep … it’s nice to know that it’s available so you can use your actual sleeping experience to decide if your mattress needs any fine tuning.
Phoenix