This was probably last covered in 2009, so I'm looking for an update on opinions which was 50/50 split back them.
We are moving from an in-house shopping cart which handled native currency checkout, to two identical shopify stores to achieve the same functionality.
We already have company_name.com for our Canadian site, and for AdWords related reasons we don't want to switch the Canadian domain.
For the American website, we are deciding between CompanyName.us or CompanyNameUSA.com.
In the past .us was considered a bit spam like, I'm not sure if that is still a concern, with many companies going after cybersquatters.
Also, do consumers really look at the domain name anymore? For me, I quickly glance for the secure green lock, and the site content determines reliability.
As a Canadian, we operate on US servers, so we meet nexus requirements for a .US domain (but hopefully not states sales tax, but that another topic).
Be interesting to see if opinions have changed in the past 8 years.