the products comparison list shows side by side your various spine thickness measurements(by the handle, above the heel, halfway between blade, 1cm before tip). so its cool for me because i can tell in terms of spine thickness ittetsu is closer to gesshin ginga gyuto as opposed to gengetsu, kochi, heiji etc...
specs dont tell the full story but atleast i can get an idea of how drastic the taper is from handle to tip. also comparing weights of different knives side by side is fun too. ittetsu's weight is around 180grams, ginga 130 grams, and gengetsu is 217grams.
my favorite spec is the blade thickness halfway between spine and edge. according to the comparisons ittetsu is thinner ground halfway than gengetsu, kochi and heiji(obviously) but not quite thin as gesshin ginga.
the product comparison feature actually answered most of my questions. if you suggested this feature more often to your customers you may save yourself some time by not needing to answer so many emails
the only questions i really had left were concerning steel hardness(is it closer to gengetsu white steel or ginga white steel) and the stiffness of the blade. since gesshin ittetsu is san mai and a little thicker than gesshin ginga i was expecting/hoping it would be a stiffer blade too.