Not sure what you are getting at. Discerning differences is what the comparison is for!If you have both new versions that are different colors and smell different (allegedly), then how can you do a fair “blind” comparison between the two? You plan to cover your eyes and put a clothespin on your nose? lol
Assigning qualities or lack thereof to a soap because of preconceived notions is what we are trying to eliminate. And since i have no idea which soap is which, i can still provide a fair comparison, even if the soaps are wildly different.