I think the one that is less 'smooth' looks more realistic. Interesting effect, whatever it is. It gives the impression of a real steel surface with a little bit of corrosion on it or something.
For the crystalline armor effect either one would be the same if you altered it appropriately.
So, take your pick. Or, alternatively, something resembling a cross-section of a steel girder. I'm looking for images to represent 'internal reinforcement' you see. That armor with the indentation looks like a good representation of a bulkhead, but it's not necessarily the only image that would work.
Once I have a decent crystalline image, I'm gonna be hard-pressed to imagine what
organic internal reinforcement should look like.
I hope you can get the 'mirrored surface' effect for the scattering armor.