Hi abq5701,
This is a very different design from the PLB Beautiful and would feel quite different. The comfort layer or “zone” would be firmer and thinner (meaning a firmer top feel and less pressure relieving) and the support base would be firmer in the transition layer but softer in the thicker 6" bottom core layer so this would roughly even out. the wool ticking would firm up the top layer even more.
This “firmer” design would probably be an improvement for stomach sleeping (which needs firmer thinner comfort layers and firmer support layers to prevent a swayback sleeping position) but would likely move you away from the pressure relief level you would prefer compared to the PLB.
This post from earlier today and post #7 here by Steve today will highlight some of the difficulties in trying to duplicate the more subjective “feel” of a mattress rather than “design” to more objective targets of pressure relief, posture and alignment, and preferences.
Phoenix