More people would know Superman because his legacy started way before Harry Potter via comic books and grew and grew to movies today. However Harry Potter was just created 12 years ago and has now ended, because it is based on a series and the series has ended. Superman will always be there, but Harry Potter just ended and may be forgoten about in the next 10 years.
They are both well known fictional characters and it would be impossible to determine who is the most famous.
superman easy coz he would throw loads off buses at harry potter before he could even get his wand out ============================================================== hmmm if theyr argueing then it would be who ever strikes first but if it was a 3,2,1 fight then harry could just dissaperate somewhere (faster than super speed) and use that avada doody killer spell :) dun
Harry potter
harry potter
Hundreds of people roleplay Harry Potter it would be impossible to determine exactly how many as people use various different ways to do so.
Harry potter
harry potter
The closest you can get to a Catch Phrase in Harry Potter would be the classic "Bloody Hell"
That would be a matter of opinion, and in my opinion i would consider Daniel Radcliff, or Harry Potter to be more famous.
An idiots guide to Harry Potter would suit you perfectly. (Real Book and would actually fulfill what you are asking for.
Harry Potter/ It would have to be A Christmas Carol by Charles Dickens.
Harry Potter will appear in the Harry Potter books. If he was to appear in any other published novel it would violate copyright.