How does the content of the images look compared to the same prompt and seed for 512x512? I ask because when I make 768x896 with M1 MAX the resulting image is l

How does the content of the images look compared to the same prompt and seed for 512x512? I ask because when I make 768x896 with M1 MAX the resulting image is less coherent, more noisy, and or has repeating subject matter, nothing really usable unlike 512x512.