Juergen Klopp's side have only the league and the Champions League to focus on having been knocked out of the League Cup and the FA Cup, a luxury that City do not enjoy.
"It's more easy for the team that is involved in just two competitions, compared to the team that is involved in four," Pellegrini told reporters.
"City have to play the final of the Carabao (League) Cup which will suspend a game. If they make the semi-final of the FA Cup, they must suspend another game.
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"They have midweek with the Champions League, so it's not easy to compete in all the competitions."
(Reporting by Shrivathsa Sridhar in Bengaluru; Editing by Greg Stutchbury)
