Beeton told Yahoo OMG! that The Script frontman - whom he met on tour - is 'too much of a nice guy' to take a Simon Cowell-esque approach to judging.
He said: "I don't think Danny will be critical, he's too much of a nice guy. When the TV cameras come on, he might change a bit but it depends on how they're approaching the show.
"It's going to be weird to see him in a judgmental role. He stays away from the whole celebrity thing, which surprises me."
The 23-year-old, who was once nominated for a BT Digital Music Award, thinks Danny got the job to give The Voice an indie edge that rival The X Factor lacks.
He continued: "The Voice is trying to differentiate themselves from the X Factor and Danny is different to all the other judges.
"He's the middle ground, he brings a bit of indie to the line-up, which is probably why they chose him over someone like Will Young.
Sam also revealed that he'd been asked to audition for The Voice, but decided not to. "Anyone indie or alternative panics or dies in the middle of those types of shows," he reasoned. "Just look at X Factor's Janet Devlin - she's good but not in that show. In that environment she crumbled."