so those categories used to be called "Frosted Extreme Detail" and "Fine Ultra Detail." I believe the "Smoothest Detail" will be the best bang for your buck. The material is acrylic based but is more brittle than the plastic FFG uses.
After I primed the unpainted fins, I used a razor to cut into the grooves, making them more prominent to match the rest of the model.
Full disclosure, my version is a salvage-job and is 75% the original FFG miniature, hence the detail of the main structure may appear better.