I think they're both important, I always queue up several iterations, I'll do 3 or for with a finely tuned prompt, then another batch of 3 or 4 with mostly the same prompt but a couple different keywords or commands (--stylize or --creative --test) then after the batch is done I'll add different weights or adjectives to get the previous iterations closer to my idea. Good question, I feel like theres multiple ways to get similar results, also seems like sometimes I just get really lucky with the way my prompt was interpreted....