Read this reviews, it can help you make a choice
I have both, but I prefer no toe loop.
So both my husband and son do not toe loop. My husband wore his all over Italy. He wears them hiking as well. All the 20 something guys I know wear the toe loop and hike and basically live in theirs. So this is no help I am sure. My daughters all wear the toe loops. Go Chaco!
The Z/1 (wrap around foot model) versus the Z/2 (toe loop model) for me is an easy analogy. I prefer Z/1's as my feet are not stressed at all provided the strapping wraps around food through midsole are not too tight. With the toe loop, I found that my toe is uncomfortably stressed with my circulation affected. I did order one z/2 a couple of years ago and immediately returned for an exchange to a z/1 style. I have three residences on earth--Uganda, U.S. Virgin Islands and Tennessee so I keep minimally 3 pairs of Z/1's in each location.