Battle cry

Ok, it's more like a march, but still:

I don’t know but I’ve been told,
Gryffindor brooms are plated gold
Somehow it has come to pass
Ravenclaw’s are plated brass

Gryffindor’s brooms shine nice and bright,
But Ravenclaws are fast and light.
Gryffindors are smart brave witches
But ‘claws will score and catch the snitches.