'Hush Hush Sweet Charlotte' and 'Diabolique' ('55) - Spoilers

In HHSC, Woman 1 and her boyfriend conspire to get Woman 2 to 'kill' him, to bilk her out of her property. She has a mental problems and when he comes back soggy from his drowning she loses her grip.

In Diabolique, a man and his mistress conspire to get his wife to 'kill' him, to bilk her out of her property. She has a heart problem and when he comes back soggy from his drowning she dies.

Hush Hush is campier, but I like it better. It has more developments. Diabolique is good, but it takes almost two hours to get to the sole development. Hush Hush also has beautiful b/w cinematography.