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).