I've had another very careful look at my Claymore, and I can't see anything that would count as a flaw or imperfection on the outer surfaces when it is assembled (which it does perfectly).
There are some lines and marks on the inner surface of the baseplate, which I needed to inspect with a magnifying glass to find them, but they don't affect the working of the razor and can't be seen when it's assembled. I also have the Kickstarter "first-release" Single Edge by Supply Provision, which is mainly a stainless casting. If I examine that very, very closely, I can detect minute marks etc.
I think the quality of cast stainless razors (and zamak ones) is largely a question of careful inspection and control i.e. an awareness that not all may be perfect, and may need to be culled, and not sent out.
However, both razors work, and, for me, that's what counts above all else.
Having recently got my long-awaited Wolfman, and a Barbaros TR-1, I can safely assert that I am a fan of beautifully-machined stainless razors (also tightly quality-controlled). The downside is that their combined cost would buy four or more Claymores.
The only big enhancement of the Claymore I would consider is a mirror-polished top cap option.
