well it's one of three things. I just haven't cared enough to really track it and figure it out.
You either get set points aka trophies for each win and each loss.
You get more points for defeating clubs with more points and less points for defeating teams with fewer points. and vice versa.
a combination where there are minimums but there is a scale based on differences in points.
probably option 3. But as i said i don't really care. few do.