Comment by Oia20
Interesting! Likely because the 3D model for the photo on the 2D site is a larger model than any of the models in the 3D scene.
But what’s extra interesting about that is the 3D page is a vanilla React project while the 2D site is built with Astro SSG, and has all 90+ lighthouse scores.
This website was able to optimize your 24MB glb file to 2.4MB and the quality looks the same to me https://glb.babylonpress.org/