About 20 odd years of winning a league. Liverpool win the league and it's very significant. United win the league and its revert to type.
Surely you wouldn't disagree that winning it at Liverpool would be a bigger challenge.
But that has nothing to do with Dortmund who won the league in 2002, they didn't spent 20 years without winning the league and they were not as wealthy as Liverpool, they don't have the same profile.