Reply by Gene Howe

At least to me, there isn’t a difference that makes a difference.
We’ve all seen useful items that are so beautiful that one might call them art.
Often a craftsman’s technique is art.
Some “artists’” techniques are craft.
Maybe it’s akin to pornography. We can’t define it, but we know it when we see it.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton