That's easy, snare all the way. Slimmer profile, better quality, sturdier, better sole and better fit. Although the chron-zip has a nice lug sole which is nice but with skinny jeans, the slimmer profile of the snare wins hands down. And they're cheaper.
Thanks levislad! I wear these selected round neck tees, there's a slight scoop to them so sit just nicely under the crono, could do with a long sleeve version though coz the open stitch on the jumper can be quite chilly if there's a breeze!
They have them in a few colours. Pima cotton too...