The slight differences in handle shape/size, and blade face may cause people to like one version more than another, but I suspect people who expound on the differences between blades like TB ALC and Viscaria are basing their experience on testing ONE of EACH BLADE.
If you had a sample of 20-30 of each blade, the blades closest to the same weight, whether TB ALC or Viscaria, would feel more alike and the blades at different weights, regardless of which one, would feel more different: ie: 4 TB ALCs and 4 Viscarias all at 92.5 grams, would feel very similar. And 4 Viscarias of 92.5 grams would feel very different than 4 other Viscarias of 84.5 grams.