Hot take, Singing in the Rain is better than both.

To Have and Have Not is a decent book, and a good song.

IMO neither have anything on the greatest film ever made: Santa Claus Conquers The Martians

Realtalk, though, To Have and Have Not is a Howard Hawks joint, and that guy probably did more to advance modern cinema than Orson Welles did. My favorite Howard Hawks story is the time he called up Raymon Chandler to ask who the cluprit is in The Big Sleep only foor Chandler to tell him "I don't know."