I just checked the data and the Bikes-at-Work trailers are a bit lighter than I thought. However, I still feel that one shouldn't buy a too large or too heavy trailer for one's needs (i.e. don't get a truck if a car is sufficient, but get a truck if you need one).

My former Chariot 2-children trailer weighed approximately 25 lb; my current Burley Nomad weighs 14.5 lb and is only 25" wide. The Bikes-at-Work 32" trailer weighs 25 lb and the 64" trailer weighs 31 lb. If you want to carry groceries and other loose items, you need 2 storage boxes like the Rubbermaid 18-gal. containers (which weigh 2-3 lb each) to get the equivalent storage capacity you have in the Burley Nomad.

Of course, if you mostly need the trailer to carry lumber, a lawnmower, bicycles..., then the Bikes at Work trailer is a much better option; but if it's mostly to carry smaller items then the Nomad might be better. And if you need a trailer to tour with the family, then the Nomad is definitely a better option because you won't like carrying a half-empty bulky trailer for thousands of kilometres. In the latter case, I would say that the air resistance is the biggest advantage of the Nomad over the 2-children carrier, but shaving kilos helps when climbing 15% grades.