The ghsi site expects the message as hex digits, whereas the breitbandkatze site is expecting characters (though you can use %xx for hex digits there).
So, if on the ghsi site you enter "313233343536373839", you will get the same result as entering "123456789" on the breitbandkatze site, assuming that you also set the initial and final xor to zero and unclick any reversals. The result for both is 89a1897f (in hex).