Another hello and welcome, I'm waving from a safe personal space away near Seattle.
Some Brothers were for specific markets, so the model I got at Costco for example had a slightly different combinations of letters but the numbers were the same. That was a nice little machine, I used it as a portable/class machine for about 5-7 years. Recently during lockdown both my fancy Bernina and my basic vintage machine were having issues and needed repairs. I was using a really low end Brother for the last several months of quilting and mask making and it did just fine. It doesn't have everything I want, and it won't last forever but it had everything I needed.