"I think it really, really will come down to song choice. So I'm going to call it for David Cook," said Cowell during a Tuesday appearance on The Ellen DeGeneres Show. "I wouldn't have said it nine or 10 weeks ago, because at that point David Archuleta was a red-hot favorite. But over the weeks, this guy David Cook -- two or three performances have been staggeringly good. Whereas [Archuleta], he's kind of just [leveled off] a bit."
While Cowell thinks both Davids can sing, he agreed with DeGeneres that Archuleta lacks Cook's personality -- or personality in general.
"I think you'd struggle a bit on the interview. Once you got past 'gee' and, 'gosh,' there's not very far to go," Cowell said about Archuleta's speaking skills. "But that's just the way he is. He's a young kid. He hasn't got that charisma, experience. You get the feeling that he's kind of being almost like trained to do this over a period of time. He hasn't really experienced life. I like people who have had to work a bit... then get a break."
Cowell also chimed in on Archuleta's father Jeff -- who last week was barred from providing his son with any more musical input.
"I think with Jeff, when you look at him, he just looks a bit earnest the whole time," explained Cowell. "He just needs to relax a bit. [David's] in the final, just have a good time."
In addition, Jeff has been criticized for being an overbearing stage dad when it comes to his son -- with Naomi Judd previously stating she encountered Jeff when she was serving as a Star Search judge and David was a contestant, commenting that Jeff "is like the worst stage dad."
"I've had worse over the years," said Cowell. "I've had mothers practically attacking me after the show for what I said to their daughter or son. The stage moms and the stage dads go nuts. They just go crazy."