How does your previous job differ from the one before that?

This question involves personal experience, but generally, I can answer as follows:

In my previous job, I was involved in developing (or testing) web applications using Python, with a focus on test automation and scripting for data processing. In an earlier company, my tasks were related to supporting and maintaining existing projects, where I mainly worked on debugging and fixing bugs.

Thus, the differences lay in the level of responsibility, the type of tasks, and the technologies used: at the last place — deeper development and automation, at the previous — support and maintenance.