I gave the same UI requirement to the same model and ran it 9 times: 3 runs with no Skill, 3 with apple-design, and 3 with ui-ux-pro-max.

The results forced me to change my evaluation approach: the same set of Skill can produce one great output and another failure.

After anonymizing the 9 sets of results and handing them to two people for independent scoring, the average scores across the three groups are:
apple-design 91.3
ui-ux-pro-max 89.0
no Skill 85.8

But none of the three groups achieved 3/3 with zero defects.
apple-design and no Skill each had a case where the primary button on the phone details page got squeezed; ui-ux-pro-max had a case of horizontal overflow on a 375px narrow-screen landscape view, with the right-side content cut off. Each group also missed accessibility details: some had forms without labels, and some had icon buttons without names.

This time apple-design had the highest average score, while ui-ux-pro-max had the smallest fluctuation. The acceptance method I’ll reuse is the one from this round.

Going forward, I won’t judge Skill by a single pretty screenshot: I’ll run it 3 times first, then verify the phone, the keyboard, reduced motion effects, and failure cases. For me, Skill is more like a design bias than a guarantee of reliability.