Yes, but a clear crystal is a clear crystal.

No, different materials have different refractive indices, even if they’re both “clear crystals.” Maybe the examples given are very close in refractive index, but they still differ, therefore split light differently. https://en.wikipedia.org/wiki/List_of_refractive_indices

I’m not saying it’s the entire difference, but it certainly comes into play. It could be that the more “explosive” light example is cut identically, but held slightly askew versus the others.

Point is, it’s not just the cut that impacts the result.

Isn’t it both shape and material? The refractive index of the material is important in determining how much the light bends at the interface.