DOS Batch - Batch file to compare folders and get result to another folder

can anyone help me with comparing files in 2 folders. i want to compare 2 folders and the difference between these two should go to another folder. any idea any one?

i got this:
@ECHO ON
SET LOCALFOLDER=C:\1
SET OTHERFOLDER=C:\2
:LOCALKEYTEMP

SET FILE=DONE
FOR /F "tokens=* delims=" %%G IN ('DIR ^%LOCALFOLDER%\*.*^') DO SET FILE=%%G
SET FULLPATHLOCAL="%LOCALFOLDER%\%FILE%"
SET FULLPATHOTHER="%OTHERFOLDER%\%FILE%"
SET FILE="%FILE%"
IF "DONE"==%FILE% GOTO END
ECHO N|COMP %FULLPATHLOCAL% %FULLPATHOTHER%
IF ERRORLEVEL 1 GOTO DIFFERENTKEYS
IF ERRORLEVEL 0 GOTO DELETEBOTH
ELETEBOTH
DEL /Q %FULLPATHLOCAL%
DEL /Q %FULLPATHOTHER%
GOTO LOCALKEYTEMP

IFFERENTKEYS
DEL /Q %FULLPATHLOCAL%
COPY FULLPATHOTHER C:\3 /S

GOTO LOCALKEYTEMP
:END
ECHO ALL FILES DELETED IN %LOCALFOLDER%
ECHO ALL NON IDENTICAL FILES REMAIN ON %OTHERFOLDER%
::xcopy C:\2\*.* C:\3 /S
CLS
EXIT

but this will not help me in moving the difference to new folder and the loop somehow doesnt' seem to work for more than one file..

diff -u <dir1> <dir2> > <path to difference>/diff.txt

problem solved man...