I didn't reply in the other thread, but I have both and I find that my Ibex ones are actually holding up better. This may be because I think the fingers are slightly longer so the webbing part (between the fingers) fits snugger on me for my Ibex liners than the smartwool ones. I also have a pair of Icebreaker liners as well. The Icebreaker ones fit like Ibex and they are the softest, but I don't think they are quite as warm as the other two brands.

Of the three, the Ibex ones seem to be the most durable (even though that's opposite what everyone else said!).