Ok, current art without *(derpibooru_p_low)* generated better wings:
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But as far as I check, without *(derpibooru_p_low)* art is often generated more buggy, especially when generating duo+:
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without *(derpibooru_p_low)* | with *(derpibooru_p_low)*
On last example, in without the face is less detailed, but in the general plan it probably turned out better.
The influence of this tag is comparable to such a base as *deformed*, *ugly*, *extra legs* or *distracted*. If you remove one of these tags, then on a specific art the difference may not be noticeable. But when generating a large number of different arts, it becomes clear that arts with this tag are generated more stably and/or detailed.
Sometimes small, but there is always a difference.