Which one would have a greater effect in comics and greater pop culture?
The permanent death of Superman or the permanent death of Spiderman?
This means no more movies, comics, video games, toys, costumes, merchandise or any future reference to the characters. DC or Marvel can never bring the characters back in any form via rebirth or alternate realities or What ifs; and cannot make any cameos anywhere. Old comics that the characters appear in cannot be reprinted and no one can ever draw or write about these characters again.