perl -e "system join ' ',qw(git diff --no-index Folder1 Folder2)"

diff --git a/Folder1/NEW.txt b/Folder2/NEW.txt
index 5d308e1..e69de29 100644
--- a/Folder1/NEW.txt
+++ b/Folder2/NEW.txt
@@ -1 +0,0 @@
-NEWTEXTINSERTED