Revisiting/revised paper
Although you can split a paper in two, it is often not the best choice, known as salami publication. 

There are, of course, papers revisiting a certain topic, sometimes tens or hundreds years after the first publication. Revisiting a topic is not the same, as simply splitting a paper in two. There is no specific structure for a revisiting paper - the term refers to its relation with previous research only.

In academic publishing, we call a revised paper a version of the manuscript which underwent a peer review process (i.e. in a journal), received feedback and was already corrected (revised) based on the feedback from peers. This term refers to the stage of the publication process and not to the structure or purpose of the paper.