Roberts released her first solo album Cinderella's Eyes last September and, despite a positive critical response, it reached number 17 on the UK chart.
"I think Nicola's album was a great album and very, very reflective of her personality," Cheryl told Attitude magazine.
"And she's a perfectionist as well; she would have gone in, changed words. We have a very different technique in recording.
"This was her first. I've already had two albums, so that build-up has been a while. She was ready to let loose and that's exactly what she did, it was perfect."
Cheryl added: "Her album didn't get enough recognition for my liking. I was trying to get her to write one for my record, actually, but she didn't have time for us!"
> Cheryl Cole tweets lyrics for 'A Million Lights' track 'Ghetto Baby'?
Cheryl will release her new single 'Call My Name' on June 10, while her third studio album A Million Lights will follow on June 18.
Read the full interview with Cole in the latest issue of Attitude.
Watch the music video for Cheryl's 'Call My Name' below: