I agree with emp here, they do have better footballers overall, more depth as well.
Based on current fit & important players:
VDS : Reina = draw
Vidic, Ferdinand : Carragher, Skrtl = United
Valencia, Giggs, Scholes, Nani, Carrick, Park : Gerrard, Spearing, Lucas, Meireles, Maxi = United
Rooney, Berbatov, Chicharito, Owen : Suarez, Carroll, Kuyt, Ngog = United.
They have the better team for sure and more depth on their bench, also they can play decent football sometimes as they showed against schalke so they aren't terrible all the time. THey are our enemies, we hate them but they have been dominant because they are superior in both squads and manager.