File paths and modification timestamps are shown bellow each other so you can easily see the difference. Color indication brings instant attention for suspicious cases e.g. when overwriting newer or bigger target. Time and size differences are calculated for you for faster decission. Option "Keep both" preserves the target file as is and copies the source file next to target with "copy" suffix in file name. Please note the convenient "Diff" option which opens the two files in your favorite diff application to make sure you don't overwrite the incorrect file.