The 21-year-old, who is projected as one of the top five corners available to NFL teams in the selection process in May, believes that his all-round ability to make plays puts him ahead of the rest.
Roby told ProFootballTalk.com: "I think my man to man is the best out of all of them. Just my press coverage, making plays, I think making plays might be one, too.
"I make a lot of plays, not even at corner, at special teams, too. I've blocked my share of punts, and I just make the plays wherever I'm on the field, so I think that's what really separates me.
"I'm a playmaker, I'm a game changer, when I'm on the field, there's going to be a difference made in that game, and that's what I strive to do, that's why I love to play football, and that's something I think that I have over everybody else."
Roby recorded 69 tackles, two sacks and three interceptions for the Buckeyes last season.