Superfly uses vertex displacement rather than Firefly's micropoly displacement. Good article here. FF is REYES based, SF is a path tracer - as they work completely differently I would actually build stuff differently to play to the strengths and weaknesses of each - for FF, I'd use 32 bit exr displacement maps with less dense geometry, for SF I'd use more geometry plus subD combined with bump/normal maps for the detail.

La Femme was built to take advantage of Poser's multi-res morphs - the mesh topology is more grid-like and doesn't have as many major density changes compared to other figures. Anywhere there are poles or triangles will give localised pinching at higher subD, and poles with 6 or more edges running into them will give shading artefacts at any subD level.

So yeah - displacement in SF does work kind of like subD morphs but as always seems to be the case with 3D there isn't a single 'best' approach, and context matters ;)

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