it doesn't drastically alter the images, in my experience. More like changing the trim on a dress or the shape of drapes. The structure and composition of the nearby images are similar.

random seed

https://imgur.com/a/ySOUKSM

variation seed

https://imgur.com/a/GSo0Sjm

sorry i did the HN thing (i didn't show my work):

> A neon abyss with a sports car in the foreground

>Steps: 20, Sampler: DPM++ 2M Karras, CFG scale: 7, Seed: 1496589915, Size: 512x512, Model hash: c35782bad8, Model: realisticVisionV13_v13, Variation seed: 1496589915, Variation seed strength: 0.1, Version: 1.6.0

\ the first image is the same except the seeds were random (the main seed is one of the first 4 though)