They used to have different owners years ago, Marshalls was always nicer than TJ Maxx, they had a much better shoe department and the stores were cleaner. They have maintained the cleaner better-organized look with the Marshalls stores, but the shoe section isn't the same as it used to be.
I suppose people are loyal to names and I do know a few people who have said oh let's go to Marshalls we don't have one in my town, yet they have winners lol.
The shoe dept used to look like this, a display shoe with all the available sizes in boxes below, but now they are just on racks. Much easier to find a size when it was done this way.
before

downtownboston.org