To add to the cast quality discussion, I recently received the new Nasca Razides. Pristine, crisp cast with a few somewhat exotic flaws.
It seems Prodos is using extremely soft moulds for their resin, because the models I got had essentially zero mould lines, and yet several spots had stepping, maybe a quarter of a millimetre in height. Almost as if the mould didn't align correctly on a half a centimetre section, but perfectly everywhere else. Easy to remove, but Razides are rather big and bulky. Might be a different story on infantry sized miniatures.
And here's a Razide, because why not.