You should have matched Uzcategui with Jack Dempsey, who Carpentier had to fight (being Carpentier was a WW, MW, LtHvy & Hvyweight European top title challenger). Going with the Frenchman, until Uzcategui gets comparable experience.
I don't think that matchup is as interesting given its one sided nature. Carpentier did have an extensive career.
Don't know because Carpentier never interested me enough to warrant more study of him but from what I've seen he takes a decent shot. His technique looked suspect against Tunney so can't really say. That being said I like Uzcategui alot. Sorry I didn't answer your question though