Output volume seems about the same too. You'd have to use a dB meter to really measure, but according to my Extraordinary Audio Receiving Sensors (E.A.R.S.) they are pretty much the same.
Accurate comment. There's what I think, practically speaking, a myth that pure nickel strings are quieter. They may indeed have lower output using very expensive measuring equipment, but to the ears there's really no difference; negligible at best.
I'm thrilled GHS has brought out a set of pure nickel strings. Big thumbs up. Thanks to @Jon Moody Pure nickel strings are great and I hope more peeps get the chance to learn this.
I'm ordering some next week. Rawk on.