Morgan Spurlock, the creator of Supersize Me and director of the band's first feature film This Is Us, told The Daily Telegraph that working with the band was "the closest I'll get to Beatlemania".
But Zayn, Louis and Liam dismissed the claims, saying the Liverpudlian foursome were "in a league of their own" and "much cooler than us".
The band, who found fame on ITV's X Factor, are set to release a 3D documentary that chronicles their rise to fame.
Harry Styles, Zayn Malik, Louis Tomlinson, Niall Horan and Liam Payne will attend a world premiere in London tomorrow and dedicated fans are already camping in Leicester Square in a bid to catch a glimpse of their idols.
Harry and Niall told ITV News the band felt a sense of "responsibility" towards their fans as their "role models" and that they "hoped to do it justice".
The band added that the film shows it was their loyal fans who helped propel them to international fame.
Liam said making One Direction: This Is Us - which has been described as a "warts and all" documentary - was nerve-wracking and said there could be a follow-up if it is a hit.
Harry said the experience was "really strange" but at the same time "it kind of didn't make that much of a difference".
The boyband have had a meteoric rise since appearing on ITV's X Factor in 2010, becoming the first British act to top the US Billboard chart with their debut album.
Louis said one advantage of making the film was it helped them remember everything that had happened to them in the last few years.
Asked why there was no sex or drugs in the film, Harry joked: "This is a family press conference."
Louis added: "We like to think we're rock 'n' roll but we're not really."