The music mogul, who returned to the judging panel for the new series, said this week that the auditions were beginning to unearth far better talent than last year.
"I think we've found better singers on BGT this year than X factor," Simon said in an interview for Shooting Star Chase charity.
He added: "Last year I Liked Ronan.
"But it wasn't a great year. We had to come back, freshen it up, make it younger and we've found some really good people."
Britain's Got Talent 2012 will return to TV in March.