The pair of singers go head to head in tonight's final, but Nicholas thinks he's got the edge over his rival.
Bookies may be backing Sam to easily triumph in the ultimate public vote at odds of 1/6, but Nicholas claims she'll only flop if she releases a record.
Nicholas said today: “If Sam Bailey brought out an album, would people buy it? People might think, ‘Would she sell enough records?’"
Speaking before the final, Nicholas added: “Then you’ve got me and Luke, who are younger and have got much more to give. It’s about what people like most.”
Third place finisher Luke Friend meanwhile said he wanted to release an album as soon as possible, featuring his own tracks.
In a chat with the Daily Mirror newspaper, Luke explained: “I’d love to travel around, being the hippy that I am. I want to record and get in the studio as fast as I can because I’ve got songs ready that I’ve written.”
He added: “Even if you don’t win, you should still believe you can go far.”
The X Factor 2013 final continues tonight on ITV from 7:30PM, featuring performances from Gary Barlow, Elton John, Katy Perry and One Direction.
Browse pictures of Saturday's X Factor 2013 final performances below...