Ibex wool

[Triskeliongirl]

I have both a zepher zip T and a norgie crew, and I would say they are very similar in terms of fabric, weight, etc. In fact, I have them in the same color and the fabric appears identical in both color and weight, so they look really nice layered together, kind of like a sweater set.

The norgie crews don't always have color accents, mine are solid (from ibex outlet last year, I have them in plum and blue).

[BleeckerSt_Girl]

Woolies are truly more like thin long john tops. They have those long john type cuffs.
Both Norgies and zephyrs are more like pullover tops you might wear over that. They are not quite as form fitting as the woolies, a little thicker than woolies, and have regular sleeves with just the ends hemmed, no big cuffs. More top like, less base layer like.

[Cataboo]

It's been covered, but the norgies are thicker. 2 or 3 years ago, the norgies were 2 colored, now they're solid colored.