Redmond, who played alongside the Manchester United striker in England U21's recent 6-1 win over Norway U21, compared him to the likes of Harry Kane and Saido Berahino who have previously starred for the Young Lions.
"All those players have different qualities that have got them to that level," Redmond told the Daily Mirror.
"Marcus has direct pace and his finishing is up there with some of the best I've seen for the Under-21s. He is the same as Kane and Berahino.
"Their finishing was incredible and Marcus is the same. He is just a normal kid, a typical 18-year-old who loves his football and he's fitted in well."