Crostini is USUALLY served with another dish, such as with Cacciuco or Cioppino, similar to that which you get with Bouillabase.
Bruschetta like other Italian dishes varies from region to region. In this day and age, there is no "set" Bruschetta standard or recipe. You just top it with whatever you feel like.
"Boldness has genius, power, and magic in it."
Johann Wolfgang Von Goethe