I know there was a post on these a while back. I wanted to start a new thread. I’m finishing a remodel on my basement so I don’t have my own layout currently. I was setting up a train around the tree for my son and decided to take some pictures of the well cars I currently have to show the differences. The atlas cannot navigate an O48 curve. As far as interchanable, the MTH premier containers fit nicely in the atlas car but all the others have pins that don’t really allow for swapping.