The 19-year-old helped secure France's ticket to the World Cup final last night, after a brilliant performance against Belgium.
Dixon, who played with Henry at Arsenal, believes Mbappé can be compared to his old teammate.
He said on ITV: "That's his hero [Henry].
"I was lucky enough to play with him and when I first started at Arsenal he was as fast as Mbappé.
"But there was a maturity that came with Thierry as he got older.
"This guy [Mbappé] seems to have something that Thierry didn't have.
"He's already intelligent and he still has the pace which is such an asset to have."