I would say opus was in some ways more accurate, but missed the higher level curvature feel of the site that astra picked up on.

It sounds completely trivial and likely I'm wrong here, but could it be that opus saw the reference image squished? That might explain the sharper horizontal curvature

Opus 5 is quite good, and has been the SOTA for this test (by my own subjective comparison) for the last few months. One thing it's always struggled with though is recreating smooth SVG curves/cutouts.

Another way to think about it is you could prompt Astra to put the building back in. You couldn't prompt Opus 5 to get the correct curvature of the line / cutout. That part has always been a huge struggle for models.