Hey there Wemattress,
Welcome to the Mattress Underground! Glad to have you and thanks for the question and for following this thread.
Yeah, all else being equal, a 14.75 gauge spring should be stiffer than a 15.5 gauge spring because it uses thicker wire. But I wouldn’t use gauge alone to predict how firm the base will feel. Coil diameter, number of turns, coil count, and how the springs are constructed and connected all play a role. Zoning can also make a difference in how support feels in different areas of the body. Gauge is an important spec, but it doesn’t tell the whole story.
I will offer that, generally speaking, in this category of mattresses, many manufacturers use a lower gauge (thicker wire) spring with the intent of providing a more resistant, firmer support system, essentially communicating to the mattress shopper that the mattress is going to be firmer. Having said that, I go back to the characteristics mentioned above. You can’t look at gauge or coil count in isolation and reliably predict how the finished mattress will feel.
As for the pushback you’re asking about, that’s where it gets a little more complicated. The resistance you feel comes from the entire system working together, not just the springs. The latex compresses and affects how your weight is transferred to the coils, so the same base can feel quite different depending on the thickness and firmness of the latex above it. A coil unit that feels very firm on its own might not necessarily give you the feel you want once it’s paired with latex. Two different spring designs can also provide similar support while feeling quite different in use.
Again, much like the characteristics of the spring support I mentioned above, the overall approach to support, comfort, and cover/panel construction often takes a more generalized, mass-market approach in the DTC mattress genre, whereas some independent manufacturers offer more opportunities to customize and more precisely target comfort and support to the individual sleeper. The point being, you really have to look at the complete construction and how the different components work together, rather than relying on any one spec to tell the whole story.
Since you found an all-latex mattress too rigid, I’d focus less on finding the firmest coil base and more on finding the right balance between the latex and the springs. Depending on what you found too rigid, a softer or slightly thicker latex comfort layer might be all you need. A transition layer can change how gradually you engage with the support underneath, while wool can soften the initial surface feel, but neither is automatically the answer. I’d get the coil unit and main latex layers right first, then fine-tune from there rather than adding layers in the hope of correcting the wrong underlying feel. The specs are useful for narrowing down your options, but they can’t reliably tell you how much pushback you’ll feel in the finished mattress without considering the whole build.
Oftentimes, we only look at part of the picture and not the entire one. You can’t forget that everything between you and the floor matters: the mattress cover, sheets, protector (and how tightly each fits on the mattress), bed frame, and slat spacing and thickness. Slat spacing that’s too wide can affect how the mattress is supported and, in turn, how it feels and responds under load, including its pushback.
I know it can sound daunting, but all these things are worth considering. This is why teaming up with the right mattress professional can make a meaningful difference in helping you navigate the options and find the right overall combination.
Hope this helps,
Maverick