Wolfballs (the wolfballs.com website) is an “instance” of lemmy (the software). So that means the software is the same as lemmy.ml. As you may already know, different instances of lemmy “federate” (think: connect) with each other. I’m posting this from midwest.social, for instance.

The main difference is that lemmy.ml (and many of the other main instances) have “de-federated” (think: blocked) wolfballs. This means that you cannot access their content, nor can they access yours.