[DaBear]

I think a bit also has to do with the size the blend is blended to. Most blenders have a favorite size that they have their initial test blends made in. Typically a robusto or corona, and those sizes tend to have very noticable difference from any other size the blend is made in. ie, La Sirenas were blended to the Sea Sprite/corona size, theres actually a quite noticable difference between any of the others and the Sea Sprite. Granted, that doesn't always mean its the best size, as all of our tastes are subjective.