Did Joan and Bette's competition start with 'Rain' & 'Of Human Bondage?'
Both were Maugham adaptations designed to show them off as "serious" actresses. Joan's came out first in late 1932 and flopped. Bette's came out the summer of '34 and made her a star. There's a lot more to it than that, so here's my backstory on "Rain" and "Of Human Bondage!"
http://ricksrealreel.blogspot.com/2017/02/did-joan-and-bettes-feud-start-with.html