Officially, the Americano is a heavy touring bike. It is really rugged. Is it too rugged? I guess it comes down to how rugged do you really need.
The Norwester is a lighter touring bike. It is not as rugged. Is it rugged enough? I guess it comes down to how rugged do you really need.
I picture the Norwester being sold to someone that wants to do a lot of conflicting things. They still want to do club rides, but their zippy fast criterium bike is not comfortable anymore. They might want to do light touring. They don't want to be slowed down by a really rugged touring bike.
For what you spend on a Co-Motion bike, I would get the Americano because it will be rugged enough. Lots of people see it differently, because they sell lots of Norwesters, and people tour on them, and they are happy with their purchases.
I have a Waterford touring bike that essentially has the same build specs as the Americano. An ex-girlfriend of mine spent the same amount of money on a Serrotta club bike and got a Ti frame with carbon fiber stays and a really pretty paint job. Rugged is really expensive.