i have always used d'addario and i was excited to see if these new super quality strings were better, or lasting longer, or a combination of the 2.
well, there's a difference, in the sense that yes the "new strings chime" lasts longer, but a part from a more luxury packaging i dont see that much of a change.
They are however awesome strings: i just don't find the price increase fully justified. I also tend to keep old strings on for many weeks and i am just a bedroom guitarist, so keep that in mind.