In general with these things, my thoughts are that one-shot/deslop skills should get you to a starting point quicker where you can iterate. Trying to go from 0->100 is usually a losing battle, as all of them will have elements that just don't quite work.

I do think impeccable steers away from slop / ai indicators the most. It aggressively removes standard AI thinks like eyebrows (present in the diffui render) or circle indicators (present in the flawless build). That doesn't mean the output is the best starting point however. It's a unique landing page, but not necessarily the best to convey or sell a waterproof folding phone. It comes at a cost however - impeccable leverages a lot of token spend to aggressively police itself (about $3.56, which is more than the diffui costs even with the image gen it did). Flawless was the cheapest of the three comparisons, but I don't see a significant difference between it and vanilla opus 5.5.