Visual Studio Code “vscode” can compare folders via vscode extension Compare Folders. In Unix-like shells, an alias can be used to ease command line use:

alias vsdiff="COMPARE_FOLDERS=DIFF code"

Then, to compare two folders, use:

vsdiff folder1 folder2

vsdiff allows applying changes from the left to the right. To “swap sides” click the left-right arrow in the top right corner.