I have submitted a paper to a journal. One of the reviewers is asking me what is the difference between the current paper and a previous paper I've written. In the 2nd paper I have completed the work mentioned in the previous paper. In fact the first one is a general idea and in the 2nd paper I have completed this idea.
How can I explain this? Should I say something like this:
The current paper is the completion of the first paper.
Is there any better way to state this?