The Model compared the existing formula, and the new formula, then used Monte Carlo modeling to calculate likely outcomes over time. Different colors in the bar charts too, depending on whether you went for a 5% ROI, historical market returns, etc.
Results were composed of the already earned benefits, floor benefits, and likely performance returns.
If you were like me, and chose returns equal to the hurdle rate, then the results didn't have any of the much loved secret sauce denigrated so vehemently here.

(And yet, that secret sauce over time is a much loved component of the Big B plan Only crowd here. How odd, stock market only does well for B plan investments)