Brother sister duo Same Difference – Simon Cowell’s only remaining act – are favourites to be eliminated from The X Factor semi-final on Saturday night.

According to bookmakers Paddy Power the perky pair are 4-5 on to miss out on next Saturday’s final and deny Simon Cowell victory on the show for a second year.

Meanwhile, Leon has overtaken Niki as second favourite to win the series.

The 19-year-old Scottish singer – who has emerged as the dark horse of the competition in recent weeks – now has odds of 10-3, while Niki has drifted to 8-1.

Rhydian remains the hot favourite to win at 4-11.

Meanwhile, Same Difference’s Sean has hinted that the group may split if their post X Factor music career is a flop – but admits it wouldn’t be easy.

“It’s not as if we can go our separate ways because we’re brother and sister,” the 21-year-old said.

“I mean if it does all go down the pan so to speak, maybe we can branch off and look at other projects as separates, but at this point in time I’m not even thinking about that.”

“But I want to make us renowned in the UK,” he added, “and do as much as we can for kids and keep this family thing going.”