How to save diff of two text files to third file?

Question

linux

Let's say there are 2 identical CSV files with some upload (file1.csv and file2.csv). For example, a couple of lines have been added or changed to file2.csv. Is it possible somehow using the diff command (or else how) to compare these 2 files and the lines that differ, save them in a separate file. By default, diff stores the result in spec. format (arrows, separators), but in fact you need to simply save the different lines.

Answer 1

diff --changed-group-format="%>" --unchanged-group-format="" file1.csv file2.csv > newlines.csv

The first parameter is to display different lines from the second file, the second is not to display identical ones.