I was able to find four pairs and I thought it might be an amusing trivia question. Two are different spelling and two are merely the inclusion or absence of a space between two words. I'm going to give a hint in the rotate 13 cipher.
Bar cnve vf gjb fbyvq fgngr znpuvarf, bar cnve vf gjb ryrpgebzrpunavpny znpuvarf, naq gjb cnvef ner bar bs rnpu.
Looking at a list of pinball machines while you think is cheating, obviously.
If you're going to post your answers, I guess it would be better if you would rot13 them with rot13.com until a couple people have replied. That way people who click on this thread and want to solve it for themselves won't be spoiled.