X Factor boss Richard Holloway has admitted that The Voice is "stiff competition" for the ITV1 reality show.
"The Voice is a good show and has had a fantastic amount of success in America. BBC One have kept their cards close to their chest [over the format]," he explained.
"They've got some very good judges - some household names who have been very good on The X Factor before."
He claimed: "It's a very repetitive format, so we'll have to see how people hook into that. The auditions shows are somewhat more fascinating than the live shows."
But the telly chief made it clear that the X Factor and BGT teams weren't going to ignore the potential of the new BBC One series.
He admitted: "There's no question about it, it's stiff competition for us. We will have to see. I wouldn't say I'm super-confident but I'm confident."
The Voice and Britain's Got Talent have gone head to head for the past two weekends, with BGT increasing its lead to some 1.3 million viewers in Saturday night's ratings.
The TV boss added: "The advantage we have is, our show has far more variety, and Ant and Dec. I would like to think that we're a good million or a couple of million more than The Voice."