Dei uma olhada aqui
e, pelo que pude constatar,
As adjectives the difference between flimsy and brittle is that flimsy is likely to bend or break under pressure; weak, shaky, flexible, or fragile while brittle is inflexible, liable to break or snap easily under stress or pressure.
As nouns the difference between flimsy and brittle is that flimsy is thin typing paper used to make multiple copies while brittle is (uncountable) a confection of caramelized sugar and nuts.
Mas, de acordo com o Google, a resposta se espalha por muitos outros sites, cada qual dando uma resposta mais relevante do que o outro. Queira checar.