A total of 128,575 fans have turned up to see Unitedâ€™s opening two games against New England Revolution and the Seattle Sounders. But City managed to get only 35,325 through the gates for their clashes with Club America and the Canadian side Vancouver Whitecaps.
Sir Alex Fergusonâ€™s men have also received greater coverage in the US media.
The Wall Street Journal has documented Unitedâ€™s tour since theyâ€™ve arrived, but have been quiet on Roberto Manciniâ€™s men.
Tom Cannon, professor of strategic development at Liverpool University, told the Manchester Evening News: â€śUnited have undoubtedly made a bigger impact in America. Theyâ€™ve been working there a lot longer as they have in most areas.
â€śCity are making a lot more effort now though. The influence of Beckham has made United a massive brand in America.
â€śAmerica is the only big gap left in the global football market, every other part of the world has been developed.
â€śUnited are still the biggest global brand, but City arenâ€™t that far behind. America gives the clubs a great opportunity to expand their brand.
â€śMost people assume football will take off in North America at some point, itâ€™s the next big source of talent. If owners are global players like the Glazers and the Mansour family, North America is vitalâ€ť